(a) What are the mean and standard deviation of the sampling distribution of X? Describe the shape of the sampling distribution of x. We are given that a random sample of size n= 64 is selected from a population with mean = 80 and standard deviation = First, we are asked to determine the mean and standard deviation of the sampling distribution of the sample mean, x. Recall the general properties of the sampling distribution x. The mean is, and the standard deviation is . We can use these formulas to make the desired calculations, rounding a result to three decimal places if it is not exact. Vn a = √64 Submit Skip (you cannot come back)

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