Take a lest katheine mendoua Moesatt Edge MTH-213 (Introduction to Statistics WE

Question

Take a lest katheine mendoua Moesatt Edge MTH-213 (Introduction to Statistics WEB Spring 2107 Test Test 2 Time Remaining 01 2957 Submit Test This Test: 75 pts possible 2 of 19 (11 This Question: 4 pts Help EQuestion mechanic sells a brand of automobile tre that has a Me expectancy that is normally dstributed, with a mean Me of 30000 miles and a standard deviaton of 2800 mies He wants to give a guarantee for free replacement of ties that dont wear wel. How should he word his guarantee he is wiling to replace approximately 10%of the tres? Tires that wear out by males wil be replaced free of charge. (Round to the nearest mle as needed Enter your answer in the answer box A A B a B O Ask me anything

Explanation / Answer

Mean = 30000
Stdev = 2800

P(X=?) = .10
The Z value for the same is -1.28

-1.28 = (X-30000)/2800
X = 30000-1.28*2800 = 26,416

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