The value of the coefficient of determination is _________.Test the model to see if it is valid. What are the null and alternative hypotheses? Is the model valid?

Can a pitcher's ERA (earned run average) be used to predict the number of games he will win in a season? Regression output was obtained from a recent season's data: Regression Statistics Multiple R 0.41347 R Square 0.17095 Adjusted R Square 0.15690 Standard Error 2.92062 Observations 61 ANOVA of SS MS F Significance F Regression 1 103.777085 103.7771 12.1661 0.0009 Residual 59 503.272096 8.5300 Total 60 607.04918 Coefficients Standard Error t Stat P-value Lower 95% Upper 95% ower 95.0%pper 95 Intercept 19.43054 2.0057 9.6877 0.0000 15.4172 23.4439 15.4172 23.44 ERA -1.79088 0.5134 -3.4880 0.0009 -2.8183 -0.7635 -2.8183 -0.76 The point estimate of the slope is