Win ~ ERA + RBI Regression Coefficients Estimates Model: Win.. - ERA + RBI Term Coefficient Estimate Standard Error t Value Pr > It (Intercept) 54.2310 7.44975 7.27957 7.881080-08 ERA -11.4824 1.26383 -9.08539 1.066250-09 RBI 0.0624402 0.00718418 8.69135 2.628860-09 Above is the Rguroo output for this model. Notice the p-values for both predictors are significant and very small. Because of this, we will keep both predictors in this model. If one of them had been insignificant, then we would remove the predictor from the model and see if it improves the adjusted R-squared (more on adjusted R-squared in the second to last slide)