Study the following Excel multiple regression output. How many predictors are in this model? How many observations? What is the equation of the regression line? Discuss the strength of the model in...

SUMMARY OUTPUT

Regression Statistics

Multiple R

0.842

R Square

0.710

Adjusted R Square

0.630

Standard Error

109.430

Observations

15

ANOVA

df

SS

MS

F

Significance F

Regression

3

321946.82

107315.6

8.96

0.0027

Residual

11

131723.20

11974.8

Total

14

453670.00

Coefficients

Standard Error

t Stat

P-value

Intercept

657.0530

167.460

3.92

0.0024

X Variable 1

5.7103

1.792

3.19

0.0087

X Variable 2

−0.4169

0.322

−1.29

0.2222

X Variable 3

−3.4715

1.443

−2.41

0.0349