Question The population standard deviation for the total snowfalls per year in a city is 13 inches. If we want to be 95% confident that the sample mean is within 3 inches of the true population mean, what is the minimum sample size that should be taken?
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The population standard deviation, $\sigma = 13$ inches. The desired margin of error, $E = 3$ inches. The confidence level is 95%. Show more…
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