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Let Zi , 22 , 23 , 24, 25 be independent standard normal random variables and Z the sample mean 2 - 21+ 2 2

Let Zi , 22 , 23 , 24, 25 be independent standard normal random variables and Z the sample mean 2 - 21+ 2 2 + 24 + 24 +25 5 Then P ( 240 ) is -equal to A O B. 0.1 C. 6.5 D. None of the above

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