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Suppose a simple random sample of size nequals81 is obtained from a population that is skewed right with mu equals 78 and sigma equals 18.

Suppose a simple random sample of size nequals81 is obtained from a population that is skewed right with mu equals 78 and sigma equals 18. (a) Describe the sampling distribution of x overbar. (b) What is Upper P left parenthesis x overbar greater than 81.6 right parenthesis? (c) What is Upper P left parenthesis x overbar less than or equals 73.2 right parenthesis? (d) What is Upper P left parenthesis 75.4 less than x overbar less than 81.3 right parenthesis

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