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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 19

A bakery states that 30% of its loaves contain seeds. A consumer group believes that this proportion may be incorrect. A random sample of 40 loaves is taken, and X X\,X denotes the number containing seeds.

a.

State suitable hypotheses.

[2]
b.

Find the critical region for a two-tailed test at the 5% level of significance, using a probability of less than 0.025 in each tail.

[3]
c.

Find the actual significance level.

[1]
d.

The sample contains 18 loaves with seeds. Complete the test.

[2]
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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