To estimate the mean age for a population of 4000 employees, a simple random sample of 40 employees is selected. If the population standard deviation is 8.2 years, what is the probability that the sample mean age of the employees will be within ±2 years of the population mean age? a) 0.666 b) 0.976 c) 0.876 d) 0.776 e) None of the answers are correct

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