SOLUTION: the average life of a brand of automobile tires is 30,000 miles with a standard deviation of 2,000 miles. If a Tire is randomly selected and tested find the probability that it wil

Question 324334: the average life of a brand of automobile tires is 30,000 miles with a standard deviation of 2,000 miles. If a Tire is randomly selected and tested find the probability that it will have a life span between 25,000 and 28,000 miles. Assome the variable is normally distributed
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Find the z scores for 25000 and 28000.

Find the corresponding P(z).

Subtract the probabilities to find the probability for the range,
()

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