In the EAI sampling problem, the population mean is $71,400 and the population standard deviation is $5000, For n-20, there is a 0.4108 probability of obtaining a sample mean within ±8600 of the population mean. Use z-table. a. What is the probability that is within 8600 of the population mean if a sample of size 40 (to 4 decimals)? b. Answer part (e) for a sample of size 80 (to 4 decimals).

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