How much noisier are streets where cars travel faster? A department of transportation worker wants to fit a simple linear regression model /41„ = + fl rx where x is the speed of the car in mph and y is the noise level in decibels. State the null and alternate hypothesis whether the speed of the car is significantly linearly associated with the noise level.
‘ssfl ,onsider the table you used in question 22. Can you conclude that the mpg is less for tread B in for tread A? Use the a = 0.01 level and interpret in the context of the problem. 6 of 6 a random sample of 340 cars driven at low altitudes, 46 of them exceeded […]