Normal distribution: Edexcel A‑Level Statistics questions

Every Edexcel A-Level Statistics exam question on B.6 Normal distribution, 2018–2025, with its mark scheme and examiner’s report.

All 18 questions on Normal distribution, as a list

June 2025, Data and Probability, Q9 (13 marks): 9 A random variable X has a normal distribution. (a) Describe two features of the distribution of X (2) The time, T minutes, taken by a tyre fitter to change a
June 2025, Statistics in Practice, Q4 (12 marks): 4 In order to collect data, a polling firm has a large database of people who have volunteered to take part in its surveys. The firm records a broad range of so
June 2024, Statistics in Practice, Q4 (19 marks): 4 Steven uses a delivery company for his business. The company classifies packages as ‘small’ if they weigh up to a maximum of 2 kg Steven sells pumpkins online
June 2023, Data and Probability, Q7 (12 marks): 7 Divya carries out a large-sample study to investigate the 2D:4D digit ratio for adult females The 2D:4D digit ratio is calculated by dividing the length of th
June 2022, Data and Probability, Q4 (17 marks): 4 Shai has created a video game. She makes her game free to play, with players able to buy gems to spend in the game for bonuses. She creates a model to predict
June 2022, Data and Probability, Q5 (16 marks): 5 Tom owns a busy cinema with two screens. Screen 1 has 120 seats, and Screen 2 has 300 seats. He shows a different film on each screen. Children and pensioners
June 2022, Statistics in Practice, Q5 (11 marks): 5 Dennis and Viola are doing a course in film studies. They want to conduct a study into the factors affecting film running times. They start by investigating t
November 2021, Statistics in Practice, Q3 (11 marks): 3 Mary uses UN data to find out about birth weights of male babies. For two of the countries in her sample, she finds the mean and standard deviation of male ba
November 2021, Statistics in Practice, Q4 (9 marks): 4 Sal manages a large company based in the UK. He reads a report about flexible working. It says that 32% of employees in the UK feel that flexible working is d
November 2020, Data and Probability, Q3 (12 marks): 3 Sylvia runs a course at her local university. She decides to assess her students using both a coursework assignment and an examination. Sylvia believes that t
November 2020, Data and Probability, Q6 (11 marks): 6 A certain model of concrete mixer lorry has a full capacity of approximately 6.12 m3 In practice, however, a certain amount of air is contained inside the lor
November 2020, AS Paper 1, Q6 (7 marks): 6 A scientist is investigating various species of gecko. The lengths of a random sample of 50 adult geckos of Species A are recorded, and shown in Figure 8. Len
November 2020, AS Paper 2, Q3 (13 marks): 3 The number of pairs of women’s shoes sold in the UK in 2018 was approximately 127.5 million. The number of pairs of women’s shoes sold in each shoe size in th
June 2019, Data and Probability, Q7 (10 marks): 7 Zener cards were once used in experiments designed to detect mind-reading abilities. Each Zener card is one of five designs, as presented in Figure 9. Figure
June 2019, Data and Probability, Q8 (11 marks): 8 South Western Railway operates the train service that runs from Portsmouth to London Waterloo. A page from the timetable is shown in Figure 10. (Source: South
June 2019, AS Paper 1, Q3 (5 marks): 3 Gilbert runs a company that supplies plant bulbs. One of the bulb types he supplies is anemones. He stores the anemone bulbs in very large mixed batches. The
June 2019, AS Paper 2, Q5 (4 marks): 5 Borghild is studying the changes in Pearson PLC's share price on the London Stock Exchange. She has calculated the daily change in its share price for each we
June 2018, AS Paper 1, Q4 (11 marks): 4 The Central England Temperature (CET) dataset is the longest running record of weather temperature in the world. The dataset contains a record of the maximum

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187 questions