A certain brand of automobile tire has a mean life span of 39,000 miles and a standard deviation of 2,050 miles (Assume the life spans of the tires have a bell-shaped distribution.) According to the z-scores, would the life spans of any of these tires be considered unusual? No Yes (b) The life spans of three randomly selected tires are 34,900 miles, 43,100 miles, and 39,000 miles. Using the empirical rule, find the percentile that corresponds to each life span. The life span 34,900 miles corresponds to a percentile of The life span 43,100 miles corresponds to a percentile of The life span 39,000 miles corresponds to a percentile of 5 (Round to the nearest whole number as needed.)

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