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4.2 Statistical distributions (A-level only)

4.2 Statistical distributions (A-level only)

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Question 63
a.

State the conditions under which the Normal distribution can be used as an approximation to the Binomial distribution.

[2]
b.

A marine biologist claims that the proportion of leatherback turtle hatchlings that successfully reach the ocean from their nests is 0.42. A local conservationist believes that a new beach-lighting initiative has improved this survival rate.

State suitable null and alternative hypotheses to test the conservationist's belief.

[2]
c.

To investigate this claim, a random sample of 150 hatchlings is observed, and it is found that 75 of them successfully reached the ocean.

Using a suitable approximation, test at the 5% level of significance whether or not there is evidence to support the conservationist's belief.

[4]
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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