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Speeding on the I-5. Suppose the distribution of passenger vehicle speeds traveling on the Interstate 5...

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Advance Math

Speeding on the I-5. Suppose the distributionof passenger vehicle speeds traveling on the Interstate 5 Freeway(I-5) in California is nearly normal with a mean of 73.8 miles/hourand a standard deviation of 4.96 miles/hour. Round all answers tofour decimal places.

What proportion of passenger vehicles travel slower than 64miles/hour?

What proportion of passenger vehicles travel between 63 and 70miles/hour?

How fast do the fastest 10% of passenger vehicles travel?

Suppose the speed limit on this stretch of the I-5 is 75miles/hour. Approximately what proportion of the passenger vehiclestravel above the speed limit on this stretch of the I-5?

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