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Assume that Y1 , . . . , Y are identically and independently distributed as N01, 02). For which values of a and b would

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Assume that Y1 , . . . , Y" are identically and independently distributed as N01, 02). For which values of a and b would the following random variable Z have a known, familiar distribution? If appropriate, also state its degrees of freedom. J22; (yeW \"W [3]

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