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A survey of 25 randomly selected iPhone owners showed that the purchase price has a mean of $397 with a sample standard deviation of $170. a. Compute the standard error of the sample mean. (Round the final answer to the nearest whole number.) $ Standard error b. Compute the 95% confidence interval for the mean. (Round the final answers to 2 decimal places.) The confidence interval is between $ and $ c. How large a sample is needed to estimate the population mean within $15 at a 95% degree of confidence? (Round the final answer to the nearest whole number.) Sample size

A survey of 25 randomly selected iPhone owners showed that the purchase price has a mean of $397 with a sample standard deviation of $170. a. Compute the standard error of the sample mean. (Round the final answer to the nearest whole number.) $ Standard error b. Compute the 95% confidence interval for the mean. (Round the final answers to 2 decimal places.) The confidence interval is between $ and $ c. How large a sample is needed to estimate the population mean within $15 at a 95% degree of confidence? (Round the final answer to the nearest whole number.) Sample size

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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A survey of 25 randomly selected iPhone owners showed that the purchase price has a mean of $397 with a sample standard deviation of $170. a. Compute the standard error of the sample mean. (Round the final answer to the nearest whole number.) Standard error b. Compute the 95% confidence interval for the mean. (Round the final answers to 2 decimal places.) The confidence interval is between $ and $ c. How large a sample is needed to estimate the population mean within $15 at a 95% degree of confidence? (Round the final answer to the nearest whole number.) Sample size
Transcribed Image Text:A survey of 25 randomly selected iPhone owners showed that the purchase price has a mean of $397 with a sample standard deviation of $170. a. Compute the standard error of the sample mean. (Round the final answer to the nearest whole number.) Standard error b. Compute the 95% confidence interval for the mean. (Round the final answers to 2 decimal places.) The confidence interval is between $ and $ c. How large a sample is needed to estimate the population mean within $15 at a 95% degree of confidence? (Round the final answer to the nearest whole number.) Sample size
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