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4 . Suppose you want to test the hypotheses below at a O.OS significance level HO : mu ( 1 ) - mu ( 2

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4 . Suppose you want to test the hypotheses below at a O.OS significance level HO : mu ( 1 ) - mu ( 2 ) O HI : mu ( 1 ) - mu ( 2 ) ne . O You have the following information about a set of data . Samples are independent , and distributed normally Sample ( 1 ) : X - bar = 625 5 = 40 1 = 18 Sample ( 2 ) : x - bar 610 s = 25 1 = 13 What is the value of the test statistic ? a wip [ b. 1.28 C . 282 Ca. 186

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