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6 . Suppose you have the following information about a set of data Samples are independent , and distributed normally Sample ( 1 ) :

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6 . Suppose you have the following information about a set of data Samples are independent , and distributed normally Sample ( 1 ) : x - bar = 25 8 = 15 1 = 10 Sample ( 2 ) : x - bar = 23 s = 19 1 = 12 What is the 95% confidence interval for the difference in means ? Pa 2 . ( 0.36 , 3.64 ) b. ( 1.41 3 . 12 ) L C. (0.56 , 3. 44 ) [ d. ( 134 301 )

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