Reference no: EM132410306
Hybrid Car Weight (in lbs.) Car MPG
3250 38
3675 33
3840 29
3935 30
2140 53
4010 32
2565 44
3450 32
2900 38
3345 35
3545 34
3050 41
2540 44
2410 46
2865 40
3810 32
NOTE: Before we start to do much computational/mathematical work, what is the general relationship we expect to find here between these two variables?
The values in Column A show the weight in pounds of 16 different hybrid cars made in 2018. The numbers in Column B are the corresponding gas mileages for each of the cars. Produce a graph with the regression model and R-squared value for this data set. Then answer the following questions.
a. In this model, which variable do we presume is the "dependent" variable and which is "independent"...and why?
b. What is the regression model/equation?
c. What is the associated R-squared value?
d. What does the graph tell us about the general relationship between these two variables?
e. A close friend of yours knows that you have just finished your second stats class in that awesome business program at UIW. She is planning to purchase a new (2018) hybrid car but is concerned about getting the best gas mileage possible. During the discussion, she tells you the car is somewhat heavy at 3,627 pounds.
f. Your friend winces when you give her the answer from Part E. Then she asks "How sure are you?? That MPG sounds so low for a hybrid!" What is your response?