6) The number of pieces of mail delivered to a local small business per day is normally distributed with a mean u = 8.4 and
6) The number of pieces of mail delivered to a local small business per day is normally distributed with a mean u = 8.4 and a standard deviation 0 = 2.8. Determine the mean and standard deviation of the sampling distribution of the sample means for samples: (a) of size 50; (b) of size 100; (c) of size n = 200
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