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.