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4.2 Statistical distributions (A-level only)

4.2 Statistical distributions (A-level only)

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Question 175

A marine biologist claims that 12% of the coral reef sections in a protected lagoon exhibit signs of thermal bleaching. A researcher, suspecting the biologist is understating the severity of the bleaching, examines a random sample of 450 sections and identifies 62 that are bleached.

Using a suitable approximation, test at the 5% significance level whether there is evidence to support the researcher's suspicion. State your hypotheses clearly.

[6]
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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