1 fuel economy part 3 consider again the data in exercise, Ask an Expert

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1. Fuel economy, part 3. Consider again the data in Exercise 33 about the fuel economy and weights of cars.

a) Create a 95% confidence interval for the average fuel efficiency among cars weighing 2500 pounds, and explain what your interval means.

b) Create a 95% prediction interval for the gas mileage you might get driving your new 3450-pound SUV, and ex- plain what that interval means.

2. SAT scores, part 3. Consider the high school SAT scores data from Exercise 35 once more. The mean Verbal score was 596.30.

a) Find a 90% confidence interval for the mean SAT Math score for all students with an SAT Verbal score of 500.

b) Find a 90% prediction interval for the Math score of the senior class president, if you know she scored 710 on the Verbal section.

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