Processing results: tables, graphs and calculations: Edexcel International A Level Biology questions

Edexcel International A Level Biology past-paper questions on P.1.4 Processing results: tables, graphs and calculations, 2019–2025, with mark schemes and examiner’s reports where available.

All 206 questions on Processing results: tables, graphs and calculations, as a list

June 2025, AS Unit 3, Q2(a)(ii) (3 marks): Draw a table that includes only the results obtained at 20 hours. (3)
June 2025, AS Unit 3, Q2(a)(iii) (4 marks): Plot a suitable graph for the results obtained at 20 hours. (4)
June 2025, AS Unit 3, Q3(b)(i) (2 marks): Calculate the percentage difference between the highest and lowest values obtained from these nine regions. Use the formula: difference between two values
June 2025, Unit 6, Q2(b)(ii) (2 marks): The tables show the results of this investigation. 5‑year‑old plantation Sample site Mass of earthworms / g 1 12.3 2 14.7 3 15.2 4 10.8 5 11.1 mean 12.8 SD 2.0
June 2025, Unit 6, Q2(b)(iii) (2 marks): Describe how the means and standard deviations could be used to compare the results from these two plantations. (2)
June 2025, Unit 6, Q3(b) (3 marks): The table shows the results of this investigation. Time from beginning of Mean percentage of crude oil investigation / days left in the soil trays (%) 0 1.50 30
June 2025, Unit 6, Q3(c)(i) (2 marks): Calculate the correlation coefficient, rs, using the formula: 6 d 2 r 1 s n n 1 2 Where: d = the difference between each pair of ranks n = the size of the sam
June 2025, Unit 6, Q3(c)(ii) (2 marks): The table shows some critical values for this statistical test. Number Level of significance (p) of pairs of values (n) 0.10 0.05 0.01 4 1.000 – – 5 0.900 1.000
June 2025, Unit 6, Q4(c) (3 marks): Describe how your results should be recorded, presented and analysed in order to draw conclusions from your investigation. (3)
January 2025, AS Unit 2, Q1(b)(ii) (1 mark): Give the name of a statistical test that could be used to assess the strength of the relationship between length of midpiece and swimming speed of sperm cells.
January 2025, AS Unit 3, Q1(c)(i) (3 marks): Draw a table to show all the results shown in the graph. (3)
January 2025, AS Unit 3, Q1(c)(ii) (1 mark): Calculate the gradient of the line of best fit shown in this graph. (1) Answer
January 2025, AS Unit 3, Q1(c)(iii) (2 marks): Write the equation for the line of best fit shown in this graph. Use the graph and your answer to part (ii) to write this equation. (2) Equation for this line o
January 2025, AS Unit 3, Q2(b)(i) (4 marks): Plot a graph to show all the data. (4)
January 2025, Unit 5, Q5(d)(ii) (2 marks): Describe how the investigation was designed so that error bars could be produced. (2)
January 2025, Unit 5, Q5(d)(iii) (1 mark): State how the error bars can be used to interpret the results of this investigation. (1)
January 2025, Unit 6, Q2(b)(i) (1 mark): Complete the table to show the expected (E) results. (1)
January 2025, Unit 6, Q2(b)(ii) (2 marks): Calculate the value of Chi squared (χ2) using the formula: 2 ( O E ) χ 2 E (2) Answer
January 2025, Unit 6, Q2(b)(iii) (1 mark): Give one reason why the student used a Chi squared test to analyse these data. (1)
January 2025, Unit 6, Q3(b) (3 marks): Draw a suitable graph to show the results in this table. (3)
January 2025, Unit 6, Q3(c)(i) (1 mark): Complete the table. (1)
January 2025, Unit 6, Q3(c)(ii) (2 marks): Calculate the correlation coefficient, rs, using the formula: (2) 6 d 2 r 1 s 2 n n 1 Where: ∑ = the sum of d = the difference between each pair of ranks n =
January 2025, Unit 6, Q3(c)(iii) (2 marks): The table shows some critical values for this statistical test. Number Level of significance (p) of pairs of values 0.10 0.05 0.01 4 1.000 – – 5 0.900 1.000 – 6
January 2025, Unit 6, Q4(c) (3 marks): Describe how your results should be recorded, presented and analysed in order to draw conclusions from your investigation. (3)
October 2024, AS Unit 3, Q1(b)(ii) (3 marks): Studies have shown the effect of temperature on starch synthesis. In an investigation, the rate of starch synthesis was measured at four different temperatures.
October 2024, AS Unit 3, Q1(c)(ii) (4 marks): Plot a graph of the data in the table and join the points with straight lines. (4)
October 2024, Unit 4, Q6(a)(ii) (1 mark): Which would be a more appropriate scale to use on the y-axis so that the range of values for the number of deaths can be seen clearly? (1) A linear B logarithmi
October 2024, Unit 6, Q3(b) (3 marks): Draw a suitable table to display the data and your calculated means. (3)
October 2024, Unit 6, Q3(c) (3 marks): Draw a suitable graph to show the mean mitotic index after two days in 20% oxygen and the mean mitotic index after two days in 5% oxygen. Include an indication
October 2024, Unit 6, Q3(d)(i) (2 marks): Calculate the value of t. (2) Answer
October 2024, Unit 6, Q3(d)(ii) (3 marks): The table shows the critical values of t for different degrees of freedom. The number of degrees of freedom = (nA – 1) + (nB – 1) Degrees of freedom p = 0.05 p
October 2024, Unit 6, Q4(c) (3 marks): Describe how your results should be recorded, presented and analysed in order to draw conclusions from your investigation. (3)
June 2024, AS Unit 3, Q1(d)(i) (1 mark): The 0.001% enzyme solution was prepared by diluting the 0.004% enzyme solution. Calculate the volume of the 0.004% enzyme solution needed to make 50 cm3 of 0.00
June 2024, AS Unit 3, Q3(a)(ii) (4 marks): Plot a suitable graph to show the relationship between storage time and the vitamin C content in the fruits coated with cinnamon oil. Draw a line of best fit th
June 2024, AS Unit 3, Q3(b)(ii) (1 mark): The suspension of bacteria containing 5 × 105 bacteria per cm3 was used. Each agar plate was spread with 0.2 cm3 of this suspension. Calculate the number of bac
June 2024, Unit 4, Q8(b)(i) (1 mark): The two horizontal lines in bold show the middle values for each set of the volumes of spleen. Which of the following is the term that describes the middle valu
June 2024, Unit 5, Q4(c)(i) (2 marks): Add an appropriate scale to the axes of the graph and draw a line of best fit. (2)
June 2024, Unit 5, Q4(c)(ii) (1 mark): Calculate the gradient of the line of best fit. (1) Answer N per percentage increase
June 2024, Unit 6, Q2(b)(ii) (3 marks): Plot a line graph for the results of this investigation. (3)
June 2024, Unit 6, Q3(b)(i) (3 marks): Calculate the Chi-squared value using the formula: (3) ( O E ) 2 χ 2 E Answer
June 2024, Unit 6, Q3(b)(ii) (3 marks): The table shows some critical values for Chi-squared at different degrees of freedom. Degrees of p value = 0.050 freedom 1 3.841 2 5.991 3 7.815 4 9.488 Comment
June 2024, Unit 6, Q4(c) (3 marks): Describe how your results should be recorded, presented and analysed in order to draw conclusions from your investigation. (3)
January 2024, AS Unit 3, Q1(c)(i) (3 marks): The table shows the data required to calculate the missing standard deviation for the spinach grown in soil type 2 in the autumn. (x – x )2 0.031 0.009 0.031 0.
January 2024, AS Unit 3, Q1(c)(ii) (3 marks): The graph shows the means from this investigation. Complete this graph by adding the axes, values and labels, together with the standard deviations. (3)
January 2024, AS Unit 3, Q3(b)(i) (3 marks): Draw a table to display all the results shown in this graph. (3)
January 2024, AS Unit 3, Q3(b)(ii) (3 marks): Calculate the gradient of the line at 7 days. Include units in your answer. (3) Answer
January 2024, Unit 4, Q5(c)(ii) (3 marks): Describe how the strength of the relationship between the number of people who have TB and the percentage of people who have HIV could be determined. (3)
January 2024, Unit 6, Q2(a) (2 marks): Calculate the mean rate of growth of the pollen tubes between one and five hours. Include units with your answer. (2) Answer
January 2024, Unit 6, Q3(b) (3 marks): Draw a suitable table to display the data and your calculated means for the toepad area of sample A and the toepad area of sample B. (3)
January 2024, Unit 6, Q3(c) (3 marks): Draw a suitable graph to show the mean toepad area for sample A and for sample B. Include an indication of the variability of the data. (3)
January 2024, Unit 6, Q3(d)(i) (3 marks): Calculate the value of t. (3) Answer
January 2024, Unit 6, Q3(d)(ii) (2 marks): The table shows the critical values of t for different degrees of freedom. The number of degrees of freedom = (nA – 1) + (nB – 1) Degrees of freedom p = 0.05 8
January 2024, Unit 6, Q4(c) (3 marks): Describe how your results should be recorded, presented and analysed in order to draw conclusions from your investigation. (3)
October 2023, AS Unit 3, Q2(b)(i) (2 marks): Describe how the measurements for blood glucose concentration taken in this study were processed to give the data in the table. (2)
October 2023, AS Unit 3, Q2(b)(ii) (5 marks): Plot a suitable graph to show the relationship between mean urine glucose concentration and mean blood glucose concentration. Plot the standard deviation for th
October 2023, AS Unit 3, Q2(b)(iii) (3 marks): Comment on the conclusion that urine glucose concentration is a good indicator of the blood glucose level. Use the information in the table and in your graph to
October 2023, AS Unit 3, Q2(b)(iv) (3 marks): Calculate the blood glucose concentration at a urine glucose concentration of 12 a.u. The equation for the line of best fit is y = 29.3x + 154.1. Give your answ
October 2023, AS Unit 3, Q3(b)(iii) (3 marks): Draw a table to show these results. (3)
October 2023, AS Unit 3, Q3(b)(vi) (2 marks): Justify the selection of a named statistical test to be performed on these data. (2) Statistical test Reason
October 2023, Unit 4, Q9(a)(i) (2 marks): Calculate the mean rate of global plastic production from 2000 to 2015. Give your answer to 3 significant figures. (2) Answer million tonnes per year
October 2023, Unit 4, Q9(a)(ii) (1 mark): Estimate the global plastic production in 2023. Use your calculated value from part (i). (1) Answer million tonnes
October 2023, Unit 4, Q9(a)(iii) (1 mark): Suggest why this value may be an underestimate. Use the information in the graph to support your answer. (1)
October 2023, Unit 4, Q9(b)(i) (2 marks): Describe how the probability of death due to plastic increases with the number of pieces of plastic in the gut. (2)
October 2023, Unit 5, Q7(b)(i) (2 marks): State two conclusions that can be drawn about the mean mass of muscles shown in the table. (2)
October 2023, Unit 5, Q7(b)(iii) (2 marks): Calculate the percentage difference in the mean mass of muscle G of the South African Black and the Zimbabwean Blue ostriches. a b Use the equation: percentage
October 2023, Unit 6, Q1(a) (1 mark): A student found the vitamin C content of camu camu fruits changed with the length of time in storage. Freshly picked fruits had a mean vitamin C content of 2 40
October 2023, Unit 6, Q3(b) (3 marks): Draw a suitable table to display the data and your calculated means for the mass of leaves eaten for these varieties of sorghum. (3)
October 2023, Unit 6, Q3(c) (3 marks): Draw a suitable graph to show the mean mass of leaves eaten of variety A and variety B. Include an indication of the variability of the data. (3)
October 2023, Unit 6, Q3(d)(i) (2 marks): Calculate the value of t. (2) Answer
October 2023, Unit 6, Q3(d)(ii) (2 marks): The table shows the critical values of t for different degrees of freedom. The number of degrees of freedom = (n1 – 1) + (n2 – 1). Degrees of freedom p = 0.05 p
October 2023, Unit 6, Q4(c) (3 marks): Describe how your results should be recorded, presented and analysed in order to draw conclusions from your investigation. (3)
June 2023, AS Unit 2, Q5(b)(ii) (1 mark): A scientist wanted to assess the strength of the relationship between these two variables. Which statistical test should be used to assess the strength of the r
June 2023, AS Unit 2, Q7(a) (1 mark): The smallest flower on Earth is produced by Wolffia globosa. The flower of W. globosa measures 50 μm in diameter. Which is the ratio for the diameters of the fl
June 2023, AS Unit 2, Q8(c)(i) (2 marks): Calculate the percentage decrease in snow leopards from 2002 to 2022. Give your answer to one decimal place. (2) %
June 2023, AS Unit 2, Q8(d)(i) (2 marks): The northern and central locations are separated by a desert region. The width of the region is shown by the line labelled X on the map. Calculate the width of
June 2023, AS Unit 3, Q1(c)(i) (4 marks): Plot a suitable graph to show the effect of soaking time on tensile strength. Join the points with straight lines. (4)
June 2023, AS Unit 3, Q3(b) (3 marks): Draw a table to show the data in the graph. (3)
June 2023, Unit 4, Q6(b)(i) (1 mark): Which is the approximate death rate from malaria in 2019? (1) A 1 in 180 B 1 in 600 C 1 in 1 800 D 1 in 6 000
June 2023, Unit 4, Q6(b)(ii) (1 mark): In 2019, 274 000 young children died from malaria. Which is the ratio of deaths in young children to deaths in other age groups? (1) A 0.7 : 1.0 B 1.0 : 0.5 C 1
June 2023, Unit 4, Q7(a)(i) (1 mark): There are 345 Right whales in the Gulf of Maine and together they release 15.9 kg of nitrogen per day. Calculate the mass of nitrogen released by one Right whal
June 2023, Unit 4, Q7(b)(i) (1 mark): There were approximately 5 million whales before modern commercial whaling. Calculate the percentage decrease in the number of whales due to commercial whaling.
June 2023, Unit 4, Q7(b)(ii) (1 mark): Calculations have shown that if numbers could be restored, 1.7 × 109 US tons of carbon dioxide could be removed from the atmosphere per year. A US ton is equiva
June 2023, Unit 6, Q2(c)(i) (3 marks): An odds ratio can be used to determine if the presence of mimosa trees has an effect on the presence of the cactus plants. Calculate an odds ratio using the fol
June 2023, Unit 6, Q2(c)(ii) (1 mark): The table shows how the odds ratio can be used in this investigation. Odds ratio Presence of mimosa trees Reduces the likelihood of cactus plants being present
June 2023, Unit 6, Q3(b) (2 marks): Draw a suitable table to display these data and the calculated means for the number of pupae from the flasks containing the untreated and treated culture medium
June 2023, Unit 6, Q3(c) (3 marks): Draw a suitable graph to show the mean number of pupae from the untreated culture medium and treated culture medium. Include an indication of the variability of
June 2023, Unit 6, Q3(d)(i) (2 marks): Calculate the value of t. (2) Answer
June 2023, Unit 6, Q3(d)(ii) (2 marks): The table shows the critical values of t for different degrees of freedom. The number of degrees of freedom = (nA – 1) + (nB – 1) Degrees of freedom p = 0.05 p
June 2023, Unit 6, Q4(c) (3 marks): Describe how your results should be recorded, presented and analysed in order to draw conclusions from your investigation. (3)
January 2023, AS Unit 1, Q7(c)(i) (1 mark): The unit given for the volume of a red blood cell is a femtolitre (fl). 1 fl = 1.0 × 10–15 dm3 Give the volume of a red blood cell of a yak in cm3 . Express you
January 2023, AS Unit 2, Q7(a) (2 marks): It is expected that the import of eggplants by France would increase by 1.6% per year. Calculate the expected mass of eggplants imported by France in 2023. Give
January 2023, AS Unit 3, Q2(b)(i) (3 marks): Draw a table to show the results for the concentration of ions outside the cells. (3)
January 2023, AS Unit 3, Q3(c)(i) (3 marks): Complete the graph by adding a y-axis scale, y- and x-axes labels and a line of best fit for the yam. The highest percentage change for the yam is 26% and the l
January 2023, AS Unit 3, Q3(c)(ii) (3 marks): The equation for a straight line is y = mx + c. Calculate m for the line of best fit for the potato data and write down the equation for this line. (3)
January 2023, Unit 4, Q3(b)(i) (2 marks): In 2018, 8.3 × 1012 kg of plastic was produced. Only 8.7 % of this plastic was recycled. Calculate the mass of plastic that was not recycled. Express your answe
January 2023, Unit 4, Q4(a) (1 mark): The graph shows the mass of rubber produced in Thailand in 2019 and 2020. Mass of rubber produced / tonnes 2019 2020 In 2020, Thailand produced 4.37 million ton
January 2023, Unit 4, Q6(b)(i) (1 mark): Name the type of scale that has been used on the y axis. (1)
January 2023, Unit 4, Q7(b)(v) (3 marks): These birds are thought to be monogamous, which means that they only mate with one bird of the opposite sex. Birds are only monogamous if the ratio of male to f
January 2023, Unit 5, Q7(a)(ii) (2 marks): The table gives the results for a sucrose concentration of 0.4 mol dm–3. Complete the table to calculate the standard deviation (S) for these results. 2 x x S =
January 2023, Unit 6, Q3(b)(i) (3 marks): Draw a suitable table to display the data and your calculated means for time before extension in mud and sand habitats. (3)
January 2023, Unit 6, Q3(b)(ii) (3 marks): Draw a suitable graph to display your calculated means and the variability of the data, for these two groups of animals. (3)
January 2023, Unit 6, Q3(c)(i) (3 marks): Calculate the value of t. (3) Answer
January 2023, Unit 6, Q3(c)(ii) (3 marks): The table shows the critical values of t for different degrees of freedom. Number of degrees of freedom = (nA – 1) + (nB – 1) Degrees of freedom p = 0.05 p = 0.
January 2023, Unit 6, Q4(c) (3 marks): Describe how your results should be recorded, presented and analysed in order to draw conclusions from your investigation. (3)
October 2022, AS Unit 2, Q2(a) (1 mark): One water lily leaf has a diameter of 305 cm. Which of the following shows the upper surface area of this leaf? Assume the leaf is circular. Use the formula πr2
October 2022, AS Unit 3, Q1(c)(i) (2 marks): Calculate the rate of change of vitamin C content in oranges for the first 3 weeks of storage at 4 °C. Give your answer to 2 significant figures. (2) Answer g d
October 2022, AS Unit 3, Q2(b)(ii) (4 marks): Plot a suitable graph to show the effect of substrate concentration on the initial rate of reaction. (4)
October 2022, AS Unit 3, Q2(c)(i) (3 marks): Draw a suitable table to show the results of this investigation. (3)
October 2022, AS Unit 3, Q3(a)(ii) (2 marks): The graph shows the results of this investigation. 7.0 Key 6.0 double strength 5.0 normal strength 4.0 Mass / g half strength 3.0 2.0 1.0 0.0 shoot bulb root T
October 2022, AS Unit 3, Q3(a)(iv) (3 marks): Describe the information that is needed to decide if any of the differences seen are statistically significant. . (3)
October 2022, Unit 4, Q9(a) (2 marks): Scientists have found that on average, 24 % of plant biomass is underground in the roots. The total plant biomass underground contains 113 gigatonnes of carbon.
October 2022, Unit 5, Q4(a)(ii) (3 marks): Calculate the volume of oxygen used each hour by a resting elephant with a mass of 4500 kg. Give your answer in standard form. (3) Answer
October 2022, Unit 5, Q5(b)(i) (2 marks): Calculate the difference in the volume of water use in a day by a buffalo and a camel. Give your answer in dm3 to two significant figures. (2) Answer dm3
October 2022, Unit 6, Q3(a)(iii) (3 marks): Plot a suitable graph to show the effect of the concentration of arsenic ions on the percentage germination of wheat grains. (3)
October 2022, Unit 6, Q3(b)(i) (2 marks): Calculate the correlation coefficient (rs) using the formula: (2) ∑ 6 d 2 rs = 1 – ) ( − n n 1 2 Where: Σ = the sum of d = the difference between each pair of r
October 2022, Unit 6, Q3(b)(ii) (3 marks): The table shows some critical values for this statistical test. Number Level of significance (p) of pairs of values 0.10 0.05 0.01 4 1.000 – – 5 0.900 1.000 – 6
October 2022, Unit 6, Q4(c) (3 marks): Describe how your results should be recorded, presented and analysed in order to draw conclusions from your investigation. (3)
June 2022, AS Unit 1, Q8(a) (2 marks): Cancer is one of the main causes of death in the world. In 2018, in the UK, there were 541 589 deaths in total and 166 800 of these were due to cancer. Calculat
June 2022, AS Unit 2, Q5(a)(ii) (2 marks): In 2003, it was estimated that there were 7100 Hawaii palila honeycreeper birds on this island. In 2020, it was estimated that there were 950 of these birds. Ca
June 2022, AS Unit 2, Q7(a)(ii) (2 marks): The table gives information about the surface area and volume of round and long pollen grains. Volume Surface area to Pollen grain shape Surface area / μm3 volu
June 2022, AS Unit 3, Q1(d)(i) (3 marks): Draw a suitable table to show the results for percentage germination. (3)
June 2022, AS Unit 3, Q1(d)(ii) (3 marks): Comment on the conclusion that both percentage germination and mean pollen tube growth have the same optimum sucrose concentration. (3)
June 2022, AS Unit 3, Q2(c)(i) (4 marks): Plot a suitable graph to show the data in the table. (4)
June 2022, Unit 4, Q6(b)(i) (2 marks): The data plotted for the number of people infected with HIV has been divided by 10. Explain why these numbers were divided by 10. (2)
June 2022, Unit 4, Q6(b)(ii) (2 marks): Calculate the mean rate of increase in the number of people infected with HIV from 2005 to 2010. Express your answer in standard form to an appropriate number o
June 2022, Unit 4, Q6(b)(iv) (1 mark): State how the graph can be used to estimate the number of deaths in 2025. (1)
June 2022, Unit 4, Q7(a) (1 mark): The number of Tasmanian devils is estimated to have fallen from 150 000 in the mid‑1990s to 25 000 in 2020. Calculate the percentage decrease in the number of T
June 2022, Unit 6, Q1(b)(i) (3 marks): The scientist made a prediction: There is no difference between the observed (O) and expected (E) colour preference of the zebrafish. Using the formula calculat
June 2022, Unit 6, Q1(b)(ii) (1 mark): The critical value of Chi squared was 3.84. Give a conclusion that could be made from this investigation. (1)
June 2022, Unit 6, Q2(b) (2 marks): The student found the vitamin C content of the fruits to be: kiwifruit 92.7 mg 100 g–1 guava fruit 223.3 mg 100 g–1 Calculate the percentage difference in vitam
June 2022, Unit 6, Q3(b) (3 marks): Draw a suitable table to display the data and your calculated means for these two groups of plants. (3)
June 2022, Unit 6, Q3(c) (3 marks): Plot a suitable graph to show the mean diameter of the stems for each group of plants. Include an indication of the variability of these data. (3)
June 2022, Unit 6, Q3(d)(i) (2 marks): Calculate the value of t. (2) Answer
June 2022, Unit 6, Q3(d)(ii) (2 marks): The table shows the critical values of t for different degrees of freedom. The number of degrees of freedom = (nA – 1) + (nB – 1) Level of significance (p) Degr
June 2022, Unit 6, Q4(c) (3 marks): Describe how your results should be recorded, presented and analysed in order to draw conclusions from your investigation. (3)
January 2022, AS Unit 1, Q8(b) (2 marks): In 2020, about 140 million babies were born in the world. About 305 800 babies are born with sickle cell disease each year. Estimate the ratio of babies born wi
January 2022, AS Unit 1, Q8(c)(iii) (1 mark): The lifespan of a red blood cell in a person with sickle cell disease is 11 days. This is 9.17% of the lifespan of a healthy red blood cell. Calculate the lifes
January 2022, AS Unit 2, Q3(a) (2 marks): The diameter of one spherical liposome was 75 nm. Calculate the volume of this liposome using the formula: V = 4 3 πr3 Give your answer in standard form. (2) An
January 2022, AS Unit 3, Q2(b)(ii) (4 marks): Some results from this investigation are shown in the table. Diameter / μm Tensile strength / MPa 21 1280 25 830 40 610 43 580 60 390 81 190 84 180 Plot a suita
January 2022, AS Unit 3, Q3(c)(i) (3 marks): Draw a table to show the results at 50 minutes for all six concentrations. (3)
January 2022, AS Unit 3, Q3(c)(ii) (2 marks): Calculate the rate of change in length of the carrot cylinder in a 1.0 mol dm−3 solution at 15 minutes. (2) Answer mm min−1
January 2022, Unit 4, Q7(b)(ii) (3 marks): Land occupies 149 million km2 of the surface of the Earth. Habitable land is 71% of this area and some of it is used for food production. Calculate the area of
January 2022, Unit 4, Q7(b)(iii) (1 mark): Estimate the effect of food production on the ratio of biodiversity of mammals. (1) Answer
January 2022, Unit 6, Q2(b) (3 marks): The table shows the results of this investigation. Number of drops of 40 80 120 160 200 water added Total number of snails breaking 1 4 7 9 10 through the membr
January 2022, Unit 6, Q2(d) (2 marks): The student decided to repeat the investigation using the same apparatus but adding four drops of water every minute. There was no significant difference in the
January 2022, Unit 6, Q3(b) (3 marks): Draw a suitable table to display the raw data and your calculated means for stream A and stream B. (3)
January 2022, Unit 6, Q3(c) (3 marks): Plot a graph to show the mean number of mayfly nymphs for stream A and stream B. Include an indication of the variability of the data. (3)
January 2022, Unit 6, Q3(d)(i) (3 marks): Calculate the value of t. (3) Answer
January 2022, Unit 6, Q3(d)(ii) (3 marks): The table shows the critical values of t for different degrees of freedom. The number of degrees of freedom = (nA − 1) + (nB − 1) Degrees of freedom p = 0.05 p
January 2022, Unit 6, Q4(c) (3 marks): Describe how your results should be recorded, presented and analysed in order to draw conclusions from your investigation. (3)
October 2021, AS Unit 1, Q8(c)(i) (1 mark): Name the statistics test being used to analyse these data. (1)
October 2021, AS Unit 1, Q8(c)(ii) (2 marks): Complete this table to show the missing values. (2)
October 2021, AS Unit 1, Q8(c)(iii) (1 mark): Calculate E (1) Answer
October 2021, AS Unit 1, Q8(c)(iv) (2 marks): Explain how a critical value table could be used to accept or reject a null hypothesis for this experiment. (2)
October 2021, AS Unit 2, Q8(c)(i) (2 marks): Calculate the value for ∑D 2. Use the table to help you. (2) ∑D 2 =
October 2021, AS Unit 2, Q8(c)(ii) (2 marks): Calculate the correlation coefficient, rs value, for this data using the formula: (2) − ( ) ∑ 6 D 2 r s = 1 ( ) − n n 2 1 Answer
October 2021, AS Unit 2, Q8(c)(iii) (2 marks): The null hypothesis is that there was no significant correlation between the age of the chicken and the mass of the eggs laid. Another scientist replicated this
October 2021, AS Unit 3, Q1(a)(iv) (2 marks): Explain how the results shown in the diagram can be used to compare the protein concentrations of food extracts. (2)
October 2021, AS Unit 3, Q1(b)(i) (2 marks): Use the information in the table to calculate the ratio of the protein content of soya beans to that of milk. Give your answer to one decimal place. (2) Answer
October 2021, AS Unit 3, Q2(b)(i) (3 marks): Draw a table to show the results of this study. (3)
October 2021, AS Unit 3, Q2(b)(iii) (2 marks): Calculate the percentage difference in colour intensity between calcium chloride and ammonium sulfate at a concentration of 0.01 mmol dm−3. (2) Answer %
October 2021, AS Unit 3, Q3(b)(i) (4 marks): Plot a suitable graph to show the relationship between proportional rate of reaction and protease concentration. Join the points with straight lines. (4)
October 2021, AS Unit 3, Q3(d) (2 marks): A student repeated the result for the 2% protease solution. Determine how 1 cm3 of a 2% solution could be obtained from a 5% stock solution of protease. (2)
October 2021, Unit 4, Q7(b)(i) (1 mark): Suggest why each point on the graph has both a horizontal and a vertical error bar plotted with it. (1)
October 2021, Unit 4, Q8(b)(iii) (3 marks): Discuss the advantages and disadvantages of presenting data in Voronoi diagrams. Use diagram B to support your answer. (3)
October 2021, Unit 6, Q3(b)(ii) (2 marks): Plot a suitable graph to show the effect of position on dune on the mean length of marram grass. (2)
October 2021, Unit 6, Q3(c)(i) (2 marks): Calculate the correlation coefficient, rs , using the formula: (2) ∑ 6 d 2 rs = 1 – ( ) n n 2 − 1 Where: Σ = the sum of d = the difference between each pair of
October 2021, Unit 6, Q3(c)(ii) (2 marks): The table shows some critical values for this statistical test. Number Level of significance (p) of pairs of values 0.10 0.05 0.01 4 1.000 – – 5 0.900 1.000 – 6
October 2021, Unit 6, Q4(c) (3 marks): Describe how your results should be recorded, presented and analysed in order to draw conclusions from your investigation. (3)
June 2021, AS Unit 3, Q1(b)(i) (3 marks): Complete the bar chart by labelling the axes and key, using the information in the table. (3)
June 2021, AS Unit 3, Q2(b)(iii) (3 marks): Draw a table to show the data on the effect of root length on mitotic index in seeds treated for 14 days. (3)
June 2021, AS Unit 3, Q3(c)(i) (5 marks): Draw a graph to show how boric acid concentration affects germination at 4 hours. Join the points with straight lines. (5)
June 2021, Unit 4, Q1(b)(i) (1 mark): Which does P represent? (1) A the maximum genome size on a bar chart B the maximum genome size on a histogram C mode genome size on a bar chart D mode genome si
June 2021, Unit 4, Q1(b)(ii) (1 mark): One genome size is missing from the graph for class 2 mosses. Calculate the frequency of this genome size. (1) Answer
June 2021, Unit 4, Q1(b)(iii) (1 mark): The mean value for the genome size of class 1 mosses was 0.449 a.u. and the mean value for class 2 mosses was 0.920 a.u. Calculate the ratio of the genome size
June 2021, Unit 5, Q5(b)(ii) (1 mark): Which statistical test would be used to analyse the effect of the increase in the number of predator encounters on the percentage of crabs running home? (1) A c
June 2021, Unit 6, Q2(b)(iii) (2 marks): Draw a suitable table to display the results of this investigation. Label the median for both varieties of switchgrass. (2)
June 2021, Unit 6, Q2(c) (3 marks): Draw a graph to show the median biomass for each variety of switch grass. Include an indication of the variability of the data. (3)
June 2021, Unit 6, Q2(d)(i) (2 marks): Calculate the value of U2. (2) Answer
June 2021, Unit 6, Q2(d)(ii) (3 marks): The table shows the critical value of U for probability value of p = 0.05. For the difference to be significant, the smallest calculated U value has to be equal
June 2021, Unit 6, Q3(c) (4 marks): Describe how your results should be recorded, presented and analysed, in order to draw conclusions from your investigation. (4)
January 2021, AS Unit 3, Q2(b)(i) (4 marks): Plot a suitable graph to show the results of this investigation. (4)
January 2021, AS Unit 3, Q3(b)(iii) (3 marks): Athletes can also develop cardiac hypertrophy as a result of exercise programmes (ECH). Individuals with HC and individuals with ECH show changes in the thickne
January 2021, Unit 6, Q3(b)(i) (3 marks): Draw a suitable table to display the results and your calculated means for village A and for village B. (3)
January 2021, Unit 6, Q3(b)(ii) (3 marks): Plot a graph to show the mean diameter of the zone of inhibition for village A and for village B. Include an indication of the variability of the results. (3)
January 2021, Unit 6, Q3(b)(iii) (3 marks): A student analysed the data with a t test using the formula ( ) − x x t = A B ( ) ( ) 2 2 S + S A B n n A B where: x– is the mean value for each village n is th
January 2021, Unit 6, Q3(b)(iv) (2 marks): The table shows the critical values of t for different degrees of freedom. The number of degrees of freedom = (nA – 1) + (nB – 1) Degrees of freedom p = 0.05 p
January 2021, Unit 6, Q4(c) (3 marks): Describe how your results should be recorded, presented and analysed in order to draw conclusions from your investigation. (3)
October 2020, AS Unit 3, Q1(b)(ii) (4 marks): Plot a graph of these results and draw a straight line of best fit through the points. (4)
October 2020, AS Unit 3, Q2(b)(i) (3 marks): Draw a suitable table to show these results. (3)
October 2020, AS Unit 3, Q3(b)(i) (1 mark): Add the scale for carbon dioxide concentration to the graph. (1)
October 2020, AS Unit 3, Q3(b)(ii) (1 mark): Draw the standard deviation for the mean area of the pores 4100 μm2 and 6300 μm2 on the graph. (1)
October 2020, AS Unit 3, Q3(b)(iii) (2 marks): It was concluded that the mean areas of these pores were significantly different. Justify this conclusion. (2)
October 2020, AS Unit 3, Q3(b)(iv) (2 marks): Predict the mean area of pores at a time in the Earth’s history when the carbon dioxide concentration was 6500 ppm. Use the equation y = mx + c, where m = 2.8 a
October 2020, Unit 6, Q2(b)(i) (1 mark): Calculate the percentage difference between the shortest and longest leaves treated with insecticide. (1) Answer %
October 2020, Unit 6, Q2(b)(ii) (3 marks): Calculate the mean length of the leaves for plants treated with insecticide and the mean length of the leaves for plants treated with water. Draw a suitable tab
October 2020, Unit 6, Q2(c) (3 marks): Plot a suitable graph to compare the results of this investigation. (3)
October 2020, Unit 6, Q2(d)(i) (3 marks): The student analysed the data with a t test, using the formula − ( x x ) t = 1 2 ( S ) 2 ( S ) 2 + 1 2 n n 1 2 where: x– is the mean value for each treatment n
October 2020, Unit 6, Q2(d)(ii) (2 marks): The table shows the critical values of t for different degrees of freedom. The number of degrees of freedom = (n1 – 1) + (n2 – 1) Degrees of freedom P = 0.05 P
October 2020, Unit 6, Q3(d) (4 marks): Describe how your results should be recorded, presented and analysed in order to draw conclusions from your investigation. (4)
January 2020, AS Unit 3, Q1(b)(iv) (2 marks): The results in the table were plotted as a bar chart. Complete the bar chart by labelling the axes and showing the standard deviation for fresh orange juice and
January 2020, AS Unit 3, Q2(b)(ii) (3 marks): The breaking force and the cross-sectional area were used to determine the tensile strength of fibres from five species of plant. The graph shows the results of
January 2020, AS Unit 3, Q3(b)(ii) (4 marks): Plot a line graph to show the relationship between detergent concentration and percentage of light transmitted. Join the points with straight lines. (4)
January 2020, AS Unit 3, Q3(b)(v) (3 marks): Estimate the percentage of light transmitted at 80 °C. Use the information in the graph and your own knowledge to support your answer. (3)
June 2019, AS Unit 3, Q1(b)(i) (4 marks): Plot a suitable graph to show the results of this investigation. Join the points with straight lines. (4)
June 2019, AS Unit 3, Q3(b)(i) (4 marks): Draw a suitable table to include the results for the experiment at 60 minutes. (4)

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