Compute the standard error of the sample mean


A survey of 36 randomly selected "iPhone" owners showed that the purchase price has a mean of $392 with a sample standard deviation of $175.

(a) Compute the standard error of the sample mean.

(b) Compute the 95 percent confidence interval for the mean.

(c) How large a sample is needed to estimate the population mean within $10?

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Basic Statistics: Compute the standard error of the sample mean
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