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A previous study of professional baseball players showed that the standard deviation of home runs hit...

A previous study of professional baseball players showed that the standard deviation of home runs hit by players who play a full season was 7.23 homeruns. If researchers want to conduct a new study to determine the number of homeruns a player hits in a year, how many players would they need in their study if they want to be within 1.5 home runs of the true mean? Use a 95% level of confidence?  

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Answer #1

Given, standard deviatim = r = 7.23 homenins Margin of esos = E = 1.5 bomeruns A 95% confidence level level of significance=2

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