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An admissions director wants to estimate the mean age of all students enrolled at a college....

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Statistics

An admissions director wants to estimate the mean age of allstudents enrolled at a college. The estimate must be within 1 yearsof the population mean. Assume the population of ages is normallydistributed and the population standard deviation is 9.5 years.Determine the minimum sample size required to construct a 80%confidence interval for the population mean age. Determine theminimum sample size required to construct a 95% confidence intervalfor the population mean age. Which level of confidence requires alarger sample size? 80% 95%

Answer & Explanation Solved by verified expert
4.2 Ratings (688 Votes)
Solution Given thatstandard deviation 95margin of error E 1a At 80    See Answer
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