Question: 650-Q2 You are trying to take a sample from a large population, and need to determine the appropriate sample size. You are estimating sales at

650-Q2

You are trying to take a sample from a large population, and need to determine the appropriate sample size. You are estimating sales at a large chain of department stores.

A previous survey from the same population found a standard deviation of $18.

What sample size is needed to have a 95% confidence of estimating the population mean within plus/minus $5? Show your work.

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