Homework Help: statistics

Posted by Tanya on Friday, May 9, 2008 at 12:39pm.

A maker of tires for cars has a multitude of data to support the fact that the lifetime of their tires follows a normal distribution with a mean of 42,100 miles and a standard deviation of 2,510 miles.

Find the probability that a randomly selected tire will have a lifetime of between 44,500 miles and 48,000 miles. Be certain that you round your z-values to two decimal places. Round your answer to 4 decimal places.

This is what I got:
0.3315

Am I correct?

statistics - Reiny, Friday, May 9, 2008 at 3:35pm
I got .1601

by using

http://davidmlane.com/hyperstat/z_table.html

just enter the values from your problem.

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