Question

Tires of a particular brand have a lifetime mean of 29,000 miles and a standard deviation of 3,000 miles.
a. It can be guaranteed that 75% of the lifetimes of tires of this brand will be in what interval?
b. Using the empirical rule, it can be estimated that approximately 95% of the lifetimes of tires of this brand will be in what interval?


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  • CreatedJuly 06, 2015
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