Posted by **badel** on Thursday, November 18, 2010 at 11:29pm.

An admissions director wants to estimate the mean age of all students enrolled at a college. The estimate must be within one year of the population mean. Assume the population of ages is normally distributed. Determine the minimum required sample size to construct a 80% confidence interval for the population mean. Assume the population standard deviation is 1.2 years

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