statistics
posted by Tanya .
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 zvalues to two decimal places. Round your answer to 4 decimal places.
This is what I got:
0.3315
Am I correct?

I got .1601
by using
http://davidmlane.com/hyperstat/z_table.html
just enter the values from your problem.