Coefficients:

Estimate

Std. Error

T-value

Pr(T > |t|)

Significance

(Intercept)

4.936

7.751

0.637

0.52470

C

−0.2277

0.1642

−1.387

0.16644

P

−0.3182

0.1207

−2.637

0.00876

**

E

1.089

0.1387

7.852

7.852 5.49e-14

***

CP

0.0168

0.003211

3.325

0.00098

***

CPE

−0.00006951

0.00002352

−2.956

0.00334

**

Significance codes: 0 “***” 0.001 “**” 0.01 “*” 0.05 “.” 0.1 “ ” 1

Residual standard error: 18.73 on 338 degrees of freedom

Multiple R-squared: 0.4632, Adjusted R-squared: 0.4552

F-statistic: 58.32 on 5 and 338 DF, p-value: <2.2e-16