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span A certain brand of automobile tire has a mean life 38 000 miles and...

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span A certain brand of automobile tire has a mean life 38 000 miles and a standard deviation of 2 300 miles Assume the life spans of the tires have a bell shaped distribution Yes According to the z scores would the life spans of any of these tires be considered unusual No of b The life spans of three randomly selected tires are 35 700 miles 40 300 miles and 38 000 miles Using the empirical rule find the percentile that corresponds to each life span The life span 35 700 miles corresponds to a percentile of The life span 40 300 miles corresponds to a percentile of The life span 38 000 miles corresponds to a percentile of Round to the nearest whole number as needed 2 3 4 DO let 40 38

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