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

68

miles per hour, with a standard deviation of

4

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

60

miles per hour and

76

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

Question content area bottom

Part 1

Approximately

enter your response here%

of vehicles travel between

60

miles per hour and

76

miles per hour.