A manufacturer claims that the

timer Asked: Nov 5th, 2015

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A manufacturer claims that the life span of its tires is 51 comma 00051,000miles. You work for a consumer protection agency and you are testing these tires. Assume the life spans of the tires are normally distributed. You select 100100tires at random and test them. The mean life span is 50 comma 70750,707miles. Assume sigmaσequals=900900. Complete parts​ (a) through​ (c).

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