Statistics Help
Question: A mechanic sells a brand of automobile tire that has a life expectancy that is normally? distributed, with a mean life of 24,000 miles and a standard deviation of 2100 miles. He wants to give a guarantee for free replacement of tires that? don\'t wear well. How should he word his guarantee if he is willing to replace approximately? 10% of the? tires?\r\n\r\n Edit
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