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4 Unit A2 2: Applied Mathematics (A-level only)

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Question 141

A coin is claimed to be fair. It is tossed 24 times, and X X\,X is the number of heads. A two-tailed test is carried out at the 5% level of significance, using a probability of less than 0.025 in each tail.

a.

State suitable hypotheses.

[2]
b.

Find the critical region.

[3]
c.

Find the actual significance level.

[1]
d.

Eighteen heads are obtained. Complete the test.

[2]
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4 Unit A2 2: Applied Mathematics (A-level only) Questions

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