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March 27, 2015

March 27, 2015

Posted by **Max** on Wednesday, May 25, 2011 at 7:08pm.

According to the Federal Highway Administration, teenage males drive an average of 10,718 miles each year. Assume the mileage totals are normally distributed with a standard deviation of 3573 miles. For a randomly selected teenage male, find the probability that he drives less than 9,000 miles in a year.

- math -
**MathMate**, Thursday, May 26, 2011 at 7:59amZ=(mean-x)/σ

=(10718-9000)/3573

=0.4808

From tables, probability for x≤9000

=0.5-0.184

=0.316

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