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December 22, 2014

Homework Help: MATH

Posted by Ty on Thursday, April 1, 2010 at 11:01am.

Battery Power Problem. A certain type of thermal battery
for an airplane navigation device backup power has a
mean life of 300 hours with a standard deviation of 15
hours. What proportion of these batteries can be
expected to have lives of 322 hours or less? Assume a normal
distribution of backup power device lives.

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