Question: A survey of 36 randomly selected iPhone owners showed that

A survey of 36 randomly selected “iPhone” owners showed that the purchase price has a mean of $416 with a sample standard deviation of $180.
a. Compute the standard error of the sample mean.
b. Compute the 95% confidence interval for the mean.
c. How large a sample is needed to estimate the population mean within $10?

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  • CreatedDecember 10, 2014
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