Question Details

(Solved by Expert Tutors). The dependent variable is MPG and the independent variable is the car we


. The dependent variable is MPG and the independent variable is the car weight.

?

City MPG

Weight

20

3450

23

3320

19

3390

20

3350

18

4230

18

4050

19

3255

14

4935

15

4660

17

4660

18

4210

13

5300

13

5900

26

2760

15

4660

21

3390

18

4315

24

2880

16

4295

15

4965

18

3805

25

2295

17

3640

18

3390

13

5000

18

3925

19

3355

17

4195

20

3340

20

3285

20

3345

15

4270

16

4315

25

3095

28

2805

24

2855

21

3575

17

3590

23

2570

26

2985

19

4120

34

3045

20

3690

?

Regression Analysis

? ? ? ? ?
? ? ? ? ? ? ?
?

r?

0.681

n?

43

? ?
?

r?

-0.825

k?

1

? ?
?

Std. Error?

2.499

Dep. Var.

City MPG

?
? ? ? ? ? ? ?

ANOVA table

? ? ? ? ? ?

Source

SS?

df?

MS

F

p-value

?

Regression

?546.43787944

1??

546.43787944

87.51

1.00E-11

?

Residual

?256.02723683

41??

6.24456675

? ? ?

Total

?802.46511628

42??

?

?

?

?
? ? ? ? ? ? ?
? ? ? ? ? ? ?

Regression output

? ? ?

confidence interval

variables

?coefficients

std. error

?? t (df=41)

p-value

95% lower

95% upper

Intercept

36.6337

1.8793

?19.493

2.39E-22

32.8383

40.4291

Weight

-0.0046

0.00048708

?-9.354

1.00E-11

-0.0055

-0.0036

?

?

a.??What is the point estimate for??1? Interpret this value.


b.??What is the sample regression equation?


c.??Predict the MPG for a 4000 lb. vehicle.


d. What is the coefficient of determination?

 


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About this Question

STATUS

Answered

QUALITY

Approved

DATE ANSWERED

Apr 19, 2020

EXPERT

Tutor

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