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QUESTION
a manufacture claims that the life span of its tires is 50,000 miles. you work for a consumer protection agency and you arr testing these tires.
a manufacture claims that the life span of its tires is 50,000 miles. you work for a consumer protection agency and you arr testing these tires. assumes the life spans of the tires are normally distributed. you select 100 tires are rwndom and test them. the mean life span is 49,867 miles. assume ¤=700. COMPLETE parts a through c
