Model Summary

R

R Square

Adjusted R Square

Std. Error of the Estimate

0.907

0.823

0.793

15.680

The independent variable is Serial No

ANOVA

Sum of Squares

df

Mean Square

F

Sig.

Regression

20537.903

3

6845.968

27.846

0.000

Residual

4425.370

18

245.854

Total

24963.273

21

The independent variable is Serial No.

Coefficients

Unstandardized Coefficients

Standardized Coefficients

t

Sig.

B

Std. Error

Beta

Serial No

20.479

5.898

3.857

3.472

0.003

Serial No ** 2

-2.802

0.589

-12.500

-4.758

0.000

Serial No ** 3

0.085

0.017

8.185

5.065

0.000

(Constant)

32.623

16.019

2.036

0.057