Analysis of Variance Table

Response: I
           Df Sum Sq Mean Sq F value    Pr(>F)
P           1 650591  650591  1202.8 < 2.2e-16 ***
Residuals 327 176867     541
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Call:
lm(formula = I ~ P)

Residuals:
     Min       1Q   Median       3Q      Max
-159.450   -9.170   -4.342    5.364  117.385

Coefficients:
            Estimate Std. Error t value Pr(>|t|)
(Intercept) 11.79972    1.58284   7.455 8.14e-13 ***
P            1.67011    0.04816  34.682  < 2e-16 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 23.26 on 327 degrees of freedom
  (2 observations deleted due to missingness)
Multiple R-squared:  0.7863,    Adjusted R-squared:  0.7856
F-statistic:  1203 on 1 and 327 DF,  p-value: < 2.2e-16