Question

I am asking the SAME question that was not answered completely in the ExpertQ&A. Others commented...

I am asking the SAME question that was not answered completely in the ExpertQ&A. Others commented that they do not understnad as well. Please provide the answers in Excel and detail the answers to each questions. Thank you.

Question: Create a Final Regression Model based on the data below and provide answers to the questions below. Please provide the details on how you got to the answers.

(1) How does each independent variable in your model affect the salary?

(2) Which variables (if any) did you need to transform in order to achieve linearity?

(3) Which variables (even if they didn’t end up being in the final model) required transformation into dummy variables?

(4) How do you interpret your R^2 value?

Salary

Years_Previous_Experience

Years_Employed

College degree

Gender

Department

Number_Supervised

$34,062

0

0

None

Male

Marketing

2

$54,069

9

19

BS

Female

Marketing

6

$52,577

6

6

BS

Male

Operations

2

$79,055

5

12

MBA

Male

Operations

0

$50,211

5

7

BS

Male

Operations

1

$57,230

6

9

BS

Male

Operations

1

$76,657

0

25

MBA

Female

Marketing

3

$111,309

3

22

PHD

Female

Operations

45

$45,400

11

3

None

Female

Sales

6

$118,891

0

27

PHD

Male

Operations

44

$59,407

4

9

MBA

Female

Operations

4

$56,138

7

18

MBA

Female

Sales

5

$66,544

5

14

MBA

Male

Operations

5

$45,252

6

7

BS

Male

Marketing

6

$57,352

6

18

BS

Male

Sales

5

$51,101

2

8

None

Male

Operations

2

$51,309

4

6

BS

Female

Operations

2

$43,021

0

2

None

Male

Purchasing

5

$38,091

3

1

None

Male

Operations

0

$83,820

19

6

MBA

Female

Operations

40

$51,072

6

3

MBA

Male

Purchasing

3

$78,738

3

20

MBA

Male

Marketing

4

$35,639

2

6

None

Male

Sales

1

$81,109

3

12

MBA

Female

Purchasing

6

$62,891

9

6

BS

Female

Purchasing

2

$51,074

5

9

BS

Male

Purchasing

5

$49,293

2

6

MBA

Female

Operations

3

$47,206

1

0

MBA

Female

Purchasing

0

$38,229

1

5

None

Female

Operations

2

$60,320

16

22

MBA

Female

Sales

7

$52,662

1

6

BS

Female

Purchasing

2

$55,859

4

21

BS

Female

Sales

9

$38,272

6

0

None

Male

Purchasing

2

$47,405

3

15

MBA

Male

Sales

4

$52,541

5

6

None

Female

Operations

3

$68,452

5

15

MBA

Female

Marketing

4

$52,672

4

4

MBA

Female

Marketing

8

$56,637

3

9

MBA

Male

Operations

1

$98,532

2

25

PHD

Female

Operations

1

$74,445

6

18

MBA

Female

Operations

1

$66,505

3

20

BS

Female

Operations

1

$52,461

4

9

BS

Male

Purchasing

2

$49,870

4

5

BS

Female

Operations

0

$42,549

6

5

None

Female

Sales

0

$50,381

6

9

None

Male

Operations

3

$41,738

1

0

BS

Male

Sales

4

Homework Answers

Answer #1

Please see the excel screenshots below , we transform all the category variables such as gender , degree and department by converting them to flag variables . We then goto data > data analysis tab and select regression

The regression equation is firmed using the coefficients.
All the variables whose p value is less than 0.05 significantly effect the salary variation . They are highlighted in blue

The r2 value is

0.899 , this means that the model is able to explain 89.9% variation is salary due to the independent variables , which is quite good as a model

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