Tuesday
March 31, 2015

Homework Help: math

Posted by monk on Tuesday, May 31, 2011 at 7:02pm.

a tire manufacturer believes that the tread life of its tires are normally distributed and will lst an average of 60,000 miles with a standard deviation of 3,000 miles. sixty-four randomly selected tires were tested and the average miles where the tire failed were recorded. what is the probability that the mean miles recorded when the tires failed will be more than 59,500 miles?

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