An admissions director wants to estimate the mean age of all students enrolled at a college. The estimate must be within 1 year. The ages are not normally distributed so the director knows she will need a sample of at least 30. Determine the minimum required sample size to construct a 99% confidence interval for the population mean. Assume the population standard deviation is 4.8 years (a= 4.8). On = 48 On = 62 On = 114 On = 153

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