MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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6. Suppose the population standard deviation for IQ scores is 15 points. What sample size would be required to ensure that the width of your 95% confidence interval for the mean IQ score would have a width of no more than 4 points? 

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