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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A study is done to determine if Company A retains its workers longer than Company B. The populations are normally distributed having company A standard deviation of 1.2 and company B standard deviation of 0.8. Company A samples 15 workers, and their average time with the company is five years. Company B samples 20 workers, and their average time with the company is 4.5 years. Test at 5% level of significance.

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