Mathematics, 07.04.2020 20:19, annamariaafowyhrq

Suppose a simple random sample of size nequals81 is obtained from a population with mu equals 79 and sigma equals 18. (a) Describe the sampling distribution of x overbar. (b) What is Upper P (x overbar greater than 81.2 )? (c) What is Upper P (x overbar less than or equals 74.4 )? (d) What is Upper P (77.6 less than x overbar less than 83.2 )?

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Suppose a simple random sample of size nequals81 is obtained from a population with mu equals 79 and...