1) Random samples of sizenwere selected from populations with the means and variances given here. Find the mean and standard deviation of the sampling distribution of the sample mean in each case. (Round your answers to four decimal places.)

(a) n=64,=10,²= 9

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(b)n= 100,=7,²= 4

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(c)n=6,=114,²= 1

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2)