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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 37

The usual probability that an online order is returned is 0.20. Following a change to the product description, a retailer believes that the return probability has increased. The retailer examines a random sample of 30 orders and lets X X\,X be the number returned.

a.

State suitable hypotheses.

[2]
b.

Find the critical region for a test at the 1% level of significance.

[3]
c.

Twelve orders are returned. Complete the hypothesis 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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