Table 17: Summary result for cubic regression models on classroom.

Model Summary

R

R Square

Adjusted R Square

Std. Error of the Estimate

0.329

0.109

-0.040

265.678

The independent variable is Serial No

ANOVA

 

Sum of Squares

df

Mean Square

F

Sig.

Regression

154711.944

3

51570.648

0.731

0.547

Residual

1270524.829

18

70584.713

 

 

Total

1425236.773

21

 

 

 

The independent variable is Serial No

Coefficients

 

Unstandardized Coefficients

Standardized Coefficients

t

Sig.

B

Std. Error

Beta

Serial No

-130.438

99.937

-3.251

-1.305

0.208

Serial No ** 2

12.544

9.979

7.405

1.257

0.225

Serial No ** 3

-0.352

0.286

-4.464

-1.232

0.234

(Constant)

459.366

271.427

 

1.692

0.108