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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 90% 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 $319. a. How large a sample is necessary? b. If management wants to be correct to within +$15, 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= (Round up to the nearest integer.)

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 90% 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 $319. a. How large a sample is necessary? b. If management wants to be correct to within +$15, 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= (Round up to the nearest integer.)

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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**Survey on Mean Annual Family Medical Expenses** A large company is conducting a survey to determine the mean annual family medical expenses of its employees. The management aims for 90% confidence that the sample mean will be accurate within ±$60 of the true population mean annual family medical expenses. Past research indicates that the standard deviation is approximately $319. **Questions:** 1. **How large a sample is necessary?** 2. **If management wants to be accurate within ±$15, how many employees need to be selected?** - Access **Page 1** of the cumulative standardized normal distribution table [here](#). - Access **Page 2** of the cumulative standardized normal distribution table [here](#). --- **Calculations:** a. To determine the necessary sample size: \[ n = \] (Round up to the nearest integer.) **Diagrams and Tables:** *No visual diagrams or graphs are provided in the text above.*
Transcribed Image Text:**Survey on Mean Annual Family Medical Expenses** A large company is conducting a survey to determine the mean annual family medical expenses of its employees. The management aims for 90% confidence that the sample mean will be accurate within ±$60 of the true population mean annual family medical expenses. Past research indicates that the standard deviation is approximately $319. **Questions:** 1. **How large a sample is necessary?** 2. **If management wants to be accurate within ±$15, how many employees need to be selected?** - Access **Page 1** of the cumulative standardized normal distribution table [here](#). - Access **Page 2** of the cumulative standardized normal distribution table [here](#). --- **Calculations:** a. To determine the necessary sample size: \[ n = \] (Round up to the nearest integer.) **Diagrams and Tables:** *No visual diagrams or graphs are provided in the text above.*
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