plumiProbability distributions: Edexcel A‑Level Statistics questions
Every Edexcel A-Level Statistics exam question on B.12 Probability distributions, 2018–2025, with its mark scheme and examiner’s report.
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All 8 questions on Probability distributions, as a list
- June 2025, Data and Probability, Q4 (8 marks): 4 Vicenti is a statistician and has been asked to classify the following variables. A = The number of garden pea seeds that germinate from a pack of 30 seeds,
- 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 2024, Statistics in Practice, Q5 (11 marks): 5 Linus is interested in the US stock market, where it is possible to buy shares in companies. Linus models the change, increase or decrease, in price of a shar
- June 2023, Statistics in Practice, Q4 (8 marks): 4 Anna is a statistician. She is employed to advise companies on suitable statistical models to use in a variety of scenarios. Recently, she has been asked to m
- 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
- 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 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
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