1. Create a 95% confidence interval for the average fuel efficiency among cars weighing 2400 pounds, and explain what your interval means.

2. Create a 95% prediction interval for the gas mileage you might get driving your new 3400-pound SUV, and explain what that interval means.

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X 16.CE.49-T Question Help Regression was performed on test data for 47 car models to examine the association between the weight of the car (in thousands of pounds) and the fuel efficiency miles per gallon). Complete parts (a) and (b). Click the icon to view the regression table. a) Create a 95% confidence interval for the average fuel efficiency among cars weighing 2400 pounds, and explain what your interval means. The 95% confidence interval is Data Table X (Round to two decimal places a Variable Count Mean StdDev MPG 47 33.6641 4.72241 wt/1000 47 2.86579 0.475325 Dependent variable is: MPG R-squared = 75.8% s = 2.053 with 47 - 2 = 45 df Variable Coefficient SE(Coeff) t-ratio P-value Intercept 54.3533 3.978 - 13.7 $ 0.0001 Weight -7.21938 0.3207 - 22.5 $ 0.0001 Print Done Enter your answer in the edit fields and then click Check