4. An admissions director wants to estimate the mean age of all students enrolled in a college. The estimate must be within .75 of a year of the population mean. Assume the population of ages is normally distributed. Determine the minimum sample size required to construct a 95% confidence interval for the population mean. Assume the population standard deviation is 1.5 years.
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The admissions director wants to estimate the mean age of all students enrolled in a college with a certain level of precision. Specifically, the estimate must be within ±0.75 years of the true population mean. The task is to determine the minimum sample size Show more…
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An admission director wants to estimate the mean age of all students at a college. The estimate must be within 1.5 years of the population mean. Assume the population of ages are normally distributed. Determine the minimum sample size to size to construct a 90% confidence interval for the population mean. Assume the population standard deviation is 1.6 years.
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