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A real estate developer wishes to study the relationship between the size of home a client will purchase (in square feet) and
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Answer #1

a)

family

square feet

income

family size

senior parent

parent education

1

2240

60.8

2

0

4

2

2380

68.4

2

1

6

3

3640

104.5

3

0

7

4

3360

89.3

1

1

0

5

3080

72.2

4

0

2

6

2940

114.3

1

1

10

7

4480

125.4

6

0

6

8

2520

83.6

3

0

8

9

4200

133.5

5

0

2

10

2800

95.3

3

0

6

Regression Analysis: square feet versus income family ....nt, Education

Stepwise selection of terms

α to enter = 0.15, α to remove = 0.15

Analysis of Variance

Source DF Adj SS Adj MS F-value P-value

Regression 2 4619699 2309849 30.90 0.000

income 1 380692 380692 5.09 0.059

family size 1 962595 962595 12.88 0.009

Error 7 523341 74763

Total 9 5143040

Model Summary

S R-sq R-sq(adj) R-sq(pred)

273.428 89.82% 86.92% 82.48%

Coefficients

Term Coef SE Coef T-value p-value VIF

Constant 713 363 1.96 0.091

income 12.15 5.38 2.26 0.0059 2.08

family size 372 104 3.59 0.009 2.08

Regression Equation

Square feet = 713 + 12.15 income + 372 family size

Fits and Diagnostics for Unusual Observations

Obs Square feet fit Resid Std Resid   

3 3640 3098 542 2.25 R

R large residual

From the above output, the multiple linear regression equation is,

Y = 713 + 12.15 (income, X1) + 372 (Family size, X2)

b)

Family size and income are independent variables. That should be in the final model.

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