Mathematics
Mathematics, 19.03.2021 18:00, cactuskatherine

The following regression model of gas mileage was estimated: Where Y is the gas mileage ( miles per gallon) and X is the weight of the car (pounds) The results from a sample of 74 cars are reported below:
MPG
Coefficient Standard Error
Weight- .0060087 .0005179
Cons 39.44028 1.614003
You were asked to analyze individually, the effects first of changing the units of gasoline, and then for weight. Gasoline was changed to pints, which meant MPG was in miles per pint, and the model was describing miles per pint against the weight of the car in pounds. Then, gas was left as MPG, but weight was measured in tons (2000 pounds) rather than pounds. In this case, the model described MPG against the weight of the car in tons. In this problem, you are asked to change both gallons to pints and weight from pounds to tons.
a) Interpret the estimates of the slope and intercept. Do these make intuitive sense? Why or why not?
b) The population mean automobile weight is 3000 pounds. What is the predicted value of the gas mileage of a car with average weight? You must show your work to receive credit.
c) What is the formula for an 80% confidence interval for B, ? Using this formula, construct an 80% confidence interval for Bj.
d) At the 5% level of significance, test the null hypothesis that the weight of a car does not have a positive effect on gas mileage. You must show all eight steps to receive credit. How does this result compare to your results from the problem set?

answer
Answers: 2

Other questions on the subject: Mathematics

image
Mathematics, 20.06.2019 18:04, kkartes753
Mr. bernard needs to order more boxes for his 16 inch diameter “super pizza.” use 3.14 to approximate π.
Answers: 1
image
Mathematics, 21.06.2019 14:00, layahmonaee
Which unit of measure would be the most appropriate to measure the capacity of a bottle of nail polish? a. fluid ounces b. cups c. pints d. quarts e. gallons
Answers: 1
image
Mathematics, 21.06.2019 15:40, 1tallison1
What is the first quartile of this data set? 10, 11, 12, 15, 17, 19, 22, 24, 29, 33, 38 a. 12 b. 19 c. 29 d. 10
Answers: 1
image
Mathematics, 21.06.2019 19:30, aly95
Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have
Answers: 1
Do you know the correct answer?
The following regression model of gas mileage was estimated: Where Y is the gas mileage ( miles per...

Questions in other subjects:

Konu
Mathematics, 30.10.2020 17:30
Konu
Mathematics, 30.10.2020 17:30
Konu
Chemistry, 30.10.2020 17:30
Konu
Mathematics, 30.10.2020 17:30
Konu
Mathematics, 30.10.2020 17:30