Assume That The Standard Deviation Of The Heights Of Five-Year-Old Boys Is 3.5 Inches. How Many Five- Year-Old Boys Need To Be…

Assume that the standard deviation of the heights of five-year-old boys is 3.5 inches. How many five- year-old boys need to be sampled if we want to be 90% sure that the population mean height is estimated within .5 in?

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