A country is considering raising the speed limit on a road

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A country is considering raising the speed limit on a road because they claim that the mean speed of vehicles is greater than 30 miles per hour. A random sample of 15 vehicles has a mean speed of 35 miles per hour and a standard deviation of 4.7 miles per hour. At ? = .01, do you have enough evidence to supprot the country's claim?

Calculate the p-value:

It should be .0001, but I'm not sure how to get this.

Reference no: EM13641930

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