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A simple random sample of size nequals 81 is obtained from a population with mu equals...

A simple random sample of size nequals 81 is obtained from a population with mu equals 73 and sigma equals 9 . ?(a) Describe the sampling distribution of x overbar . ?(b) What is Upper P left parenthesis x overbar greater than 74.35 right parenthesis ?? ?(c) What is Upper P left parenthesis x overbar less than or equals 70.7 right parenthesis ?? ?(d) What is Upper P left parenthesis 72.3 less than x overbar less than 74.85 right parenthesis ?? ?(a) Choose the correct description of the shape of the sampling distribution of x overbar . A. The distribution is skewed right. B. The distribution is approximately normal. C. The distribution is skewed left. D. The distribution is uniform. E. The shape of the distribution is unknown. Find the mean and standard deviation of the sampling distribution of x overbar . mu Subscript x overbar equals sigma Subscript x overbar equals

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