| Exam Board | CAIE |
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| Module | FP2 (Further Pure Mathematics 2) |
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| Year | 2016 |
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| Session | June |
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| Topic | Hypothesis test of a normal distribution |
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7 A random sample of 9 observations of a normal variable \(X\) is taken. The results are summarised as follows.
$$\Sigma x = 24.6 \quad \Sigma x ^ { 2 } = 68.5$$
Test, at the \(5 \%\) significance level, whether the population mean is greater than 2.5.