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OpenStudy (anonymous):
A production manager has measured the lifetimes of 10 batteries. The lifetimes she measured are 341, 370, 308, 422, 453, 455, 467, 493, 542, and 599 hours. She calculates the mean of these numbers. What is the mean lifetime
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OpenStudy (anonymous):
Add up all the lifetimes and divide by 10. So: (341+370+308+422+453+455+467+493+542+599) / 10 = mean
OpenStudy (anonymous):
Thus, the mean lifetime is 445. The reason you divide by 10 is because there 10 batteries in total.
OpenStudy (anonymous):
thanks
OpenStudy (anonymous):
yep
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