Model Summary

R

R Square

Adjusted R Square

Std. Error of the Estimate

0.812

0.659

0.623

68.222

The independent variable is Serial No

ANOVA

Sum of Squares

df

Mean Square

F

Sig.

Regression

170702.245

2

85351.123

18.338

0.000

Residual

88430.346

19

4654.229

Total

259132.591

21

The independent variable is Serial No

Coefficients

Unstandardized Coefficients

Standardized Coefficients

t

Sig.

B

Std. Error

Beta

Serial No

-29.357

9.599

-1.716

-3.058

0.006

Serial No ** 2

0.698

0.405

0.966

1.721

0.101

(Constant)

332.403

47.926

6.936

0.000