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4.2 Statistical distributions (A-level only)

4.2 Statistical distributions (A-level only)

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Question 59

A filling machine is set to produce packets with mean mass 100 g and known standard deviation 8 g. A supervisor believes the mean has increased. A random sample of 25 packets has mean 102 g.

Test the supervisor's belief at the 5% significance level.

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Markscheme

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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