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Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch...

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Basic Math

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Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 69 miles per hour, with a standard deviation of 5 miles per hour. Estimate the percent of vehicles whose speeds are between 54 milesper hour and 84 miles per hour. (Assume the data set has a bell-shaped distribution.)Approximately % of vehicles travel between 54 miles per hour and 84 miles per hour.*****

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