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, 21.06.2019 19:00, 592400014353
The test scores of 32 students are listed below. construct a boxplot for the data set and include the values of the 5-number summary. 32 37 41 44 46 48 53 55 57 57 59 63 65 66 68 69 70 71 74 74 75 77 78 79 81 82 83 86 89 92 95 99
Answers: 1
image
Mathematics, 21.06.2019 20:00, Chen5968
The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?
Answers: 2
image
Mathematics, 21.06.2019 22:20, azolber
In a young single person's monthly budget, $150 is spent on food, $175 is spent on housing, and $175 is spend on other items. suppose you drew a circle graph to represent this information, what percent of the graph represents housing?
Answers: 1
image
Mathematics, 21.06.2019 23:40, thetudent41
Let x = a + bi and y = c + di and z = f + gi. which statements are true?
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, 08.03.2021 08:20
Konu
Arts, 08.03.2021 08:20