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4.6 Statistical hypothesis testing (A-level only)

4.6 Statistical hypothesis testing (A-level only)

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Question 13

A restaurant's records indicate that 30% of customers order a starter. The manager believes that the population proportion has decreased. A random sample of 40 customers is taken and X X\,X is the number who order a starter.

a.

Find the critical region for a test at the 5% level of significance.

[3]
b.

Find the actual significance level.

[1]
c.

In the sample, 7 customers order a starter. Complete the hypothesis test.

[2]
d.

Explain why the actual significance level is not exactly 5%.

[1]
Markscheme

4.6 Statistical hypothesis testing (A-level only) Questions

  1. A Level
  2. /Maths
  3. /4.6 Statistical hypothesis testing (A-level only)

209 exam-style questions on CCEA A Level Maths 4.6 Statistical hypothesis testing (A-level only), covering 4.6.1 Statistical hypothesis testing (A-level only), 4.6.2 Statistical hypothesis testing (A-level only), 4.6.3 Statistical hypothesis testing (A-level only), 4.6.4 Statistical hypothesis testing (A-level only), and 4.6.5 Statistical hypothesis testing (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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