A survey of 41 randomly selected iPhone owners showed that the purchase price has a mean...

 

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A survey of 41 randomly selected iPhone owners showed that the purchase price has a mean of $414 with a sample standard deviation of $180. a. Compute the standard error of the sample mean. Standard error b. Compute the 80% confidence interval for the mean. The confidence interval is between $ and $ c. How larne a sample is needed to estimate the population mean within $13 at a 80% degree of confidence? Sample size A survey of 41 randomly selected iPhone owners showed that the purchase price has a mean of $414 with a sample standard deviation of $180. a. Compute the standard error of the sample mean. Standard error b. Compute the 80% confidence interval for the mean. The confidence interval is between $ and $ c. How larne a sample is needed to estimate the population mean within $13 at a 80% degree of confidence? Sample size

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