A trucking company considered

A trucking company considered a multiple regression model for relating the dependent variable y  total daily travel time for one of its drivers (hours) to the predictors x1  distance traveled (miles) and x2  the number of deliveries made. Suppose that the model equation is

a. What is the mean value of travel time when distance traveled is 50 miles and three deliveries are made?

b. How would you interpret  .060, the coefficient of the predictor x1? What is the interpretation of 2  .900?

c. If   .5 hour, what is the probability that travel time will be at most 6 hours when three deliveries are made and the distance traveled is 50 miles?

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