The top-selling Red and Voss tire is rated 70000 miles, which means nothing. In fact, the distance the tires can run until wear-out is a normally distributed with a mean of 71200 miles and a standard deviation of 1000 miles.
Express your answers rounded correctly to the thousandths place.
A. What is the probability that the tire wears out before 70000 miles?
B. What is the probability that a tire lasts more than 70800 miles?
3 answers
http://davidmlane.com/hyperstat/z_table.html
Thank you SO much!
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3 answers