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July 28, 2014

Homework Help: STATS

Posted by SANDRA on Friday, September 16, 2011 at 11:09pm.

The top selling Red and Voss tire is rated 70,000 miles means nothing. In fact, the distance the tires can run until they wear out is a normally distributed random variable with a mean of 82,000 miles and a standard deviation of 6,400.

a. What is the probability that a tire wears out before 70,000 miles.

b. What is the probability that a tire last more than 100,000 miles?

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