The population mean and standard deviation are given below. Find the required probability and determine whether the given sample mean would be considered unusual.

For a sample of n=60, find the probability of a sample mean being less than 21.6 if =22 and =1.21.

For a sample of n=60, the probability of a sample mean being less than 21.6 if =22 and =1.21 is

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(Round to four decimal places asneeded.)