{College Dean Narrative} What sample size should be used if we wish to estimate the population mean to within 10 units?

Population Mean

The average of all the individuals or items in a population.

Population Standard Deviation

A measure of the dispersion or spread of all values in a population from the population mean.

Calculate the sample size needed for estimating population means within a desired margin of error at a given level of confidence when the population standard deviation is known.

Verified Answer

Final Answer :

n = 2,663 (using z = 2.58)

Learning Objectives

Calculate the sample size needed for estimating population means within a desired margin of error at a given level of confidence when the population standard deviation is known.