Question: In the EAI sampling problem, the population mean is 871,600 and the population standard deviation is 85,000 . For n=30 , there is a 0.4908

In the EAI sampling problem, the population mean is 871,600 and the population standard deviation is 85,000 . For n=30 , there is a 0.4908 probability of obtaining a sample mean within 600 of the population mean. Use z-table.

a. What is the probability that x is within $600 of the population mean if a sample of size 60 is used (to 4 decimals)?

b. Answer part (a) for a sample of size 120 (to 4 decimals).

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