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What is the probability the average lifetime

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Reference no: EM131868899

A tire manufactturer claims that its tires will last an average of 40,000 miles with Standard Deviation of 3000 miles.

A sample of 49 tires was taken.

a) What is the probability the average lifetime of tires sampled was MORE THAN to 39,500? Show work

b) What about EQUAL to 39,500?

c) What about LESS than 39,500?

Reference no: EM131868899

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