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Unformatted text preview: Y = X 1 + X 2 . 3. Let X have a tdistribution with p degrees of freedom. Show that X 2 has a Fdistribution with 1 and p degrees of freedom. 4. Let S 2 be the sample variance of a random sample of size 6 from a N ( , 12) distribution. Find P (2 . 30 < S 2 < 22 . 2). 1...
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 Fall '08
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