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3.12 speeding on the i-5, part i: the distribution of passenger vehicle speeds traveling on the interstate 5 freeway (i-5) in california is nearly normal with a mean of 72.6 miles/hour and a standard deviation of 4.78 miles/hour. (a) what percent of passenger vehicles travel slower than 80 miles/hour?

User Shosaco
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Approximately 68.3% of passenger vehicles travel slower than 80 miles/hour.

User Ellen Spertus
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