| Exam Board | Edexcel |
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| Module | S4 (Statistics 4) |
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| Year | 2005 |
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| Session | June |
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| Topic | Chi-squared distribution |
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- The random variable \(X\) has a \(\chi ^ { 2 }\)-distribution with 9 degrees of freedom.
- Find \(\mathrm { P } ( 2.088 < X < 19.023 )\).
The random variable \(Y\) follows an \(F\)-distribution with 12 and 5 degrees of freedom. - Find the upper and lower \(5 \%\) critical values for \(Y\).
(3)
(Total 6 marks)