(Question 3)

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

70

miles per hour, with a standard deviation of

3

miles per hour. Estimate the percent of vehicles whose speeds are between

67

miles per hour and

73

miles per hour. (Assume the data set has a bell-shaped distribution.)

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Part 1

Approximately

enter your response here%

of vehicles travel between

67

miles per hour and

73

miles per hour.