a. How large a sample is necessary? n = 84 (Round up to the nearest integer.) b. If management wants to be correct to within ± $20, how many employees need to be selected? (Round up to the nearest integer.) n=

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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A survey is planned to determine the mean annual family medical expenses of employees of a large company. The
management of the company wishes to be 95% confident that the sample mean is correct to within ±$60 of the
population mean annual family medical expenses. A previous study indicates that the standard deviation is
approximately $280.
a. How large a sample is necessary?
b. If management wants to be correct to within + $20, how many employees need to be selected?
Click here to view page 1 of the cumulative standardized normal distribution table.
Click here to view page 2 of the cumulative standardized normal distribution table.
...
a. How large a sample is necessary?
n = 84 (Round up to the nearest integer.)
b. If management wants to be correct to within ± $20, how many employees need to be selected?
n= (Round up to the nearest integer.)
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Transcribed Image Text:K A survey is planned to determine the mean annual family medical expenses of employees of a large company. The management of the company wishes to be 95% confident that the sample mean is correct to within ±$60 of the population mean annual family medical expenses. A previous study indicates that the standard deviation is approximately $280. a. How large a sample is necessary? b. If management wants to be correct to within + $20, how many employees need to be selected? Click here to view page 1 of the cumulative standardized normal distribution table. Click here to view page 2 of the cumulative standardized normal distribution table. ... a. How large a sample is necessary? n = 84 (Round up to the nearest integer.) b. If management wants to be correct to within ± $20, how many employees need to be selected? n= (Round up to the nearest integer.) View an example Get more help - Clear all Check answer In
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