Using the empirical rule what is the approximate percentage


The number of potholes in any given 1 mile stretch of freeway pavement in Pennsylvania has a Normal distribution. This distribution has a mean of 39 and a standard deviation of 7. Using the Empirical Rule, what is the approximate percentage of 1-mile long roadways with potholes numbering between 18 and 53?

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Basic Statistics: Using the empirical rule what is the approximate percentage
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