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4.5 Statistical distributions (A-level only)

4.5 Statistical distributions (A-level only)

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Question 3
64%

The weight of organic apples in a grocery store follows a normal distribution with a mean of 150 g and a standard deviation of 12 g.

a.

Find the probability that a randomly selected apple weighs more than 165 g.

[2]
b.

Write down a null and alternative hypothesis for a two-tailed test.

[1]
c.

A farmer takes a sample of 15 apples and finds a mean weight of 158 g. Test at the 5% significance level whether there is evidence that the mean weight of apples has changed.

[3]
Markscheme

4.5 Statistical distributions (A-level only) Questions

  1. A Level
  2. /Maths
  3. /4.5 Statistical distributions (A-level only)

284 exam-style questions on CCEA A Level Maths 4.5 Statistical distributions (A-level only), covering 4.5.1 Statistical distributions (A-level only) and 4.5.2 Statistical distributions (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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