The lifetime in miles for a certain brand of tire is normally distributed with a mean of 22,000 miles and a standard deviation of 3,100 miles the tire manufacturer wants to offer a money-back guarantee so that no more than 3% of tires will qualify for a refund. what is the minimum number of miles the manufacturer should guarantee that the tires will last?

16172

Step-by-step explanation:

We are given that The tire manufacturer wants to offer a money-back guarantee so that no more than 3% of tires will qualify for a refund.

So, P(X≤x)=0.03

Refer the z table

So, z corresponding to p value 0.03 is -1.88

So,

Hence the minimum number of miles the manufacturer should guarantee that the tires will last is 16172

answear:

a

step-by-step explanation: a

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