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4.2 Statistical distributions (A-level only)

4.2 Statistical distributions (A-level only)

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Question 5

The shelf life of a specific type of fresh bread is normally distributed.

14% of the loaves spoil in fewer than 3 days. 18% of the loaves stay fresh for longer than 7 days.

Find the mean and standard deviation of the shelf life of the bread.

[6]
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4.2 Statistical distributions (A-level only) Questions

  1. A Level
  2. /Maths
  3. /4.2 Statistical distributions (A-level only)

328 exam-style questions on WJEC A Level Maths 4.2 Statistical distributions (A-level only), covering 4.2.1 Statistical distributions (A-level only), 4.2.2 Statistical distributions (A-level only), and 4.2.3 Statistical distributions (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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