Question 27 - 33: To get a clearer picture of what affects the number of hits a pitcher gets, the data set for the 57 pitchers from questions 13 - 26 was expanded to include the following explanatory variables: IP = innings pitched HB = hit batters (batters hit by a pitch) BB = base on balls (the number of walks issued by a pitcher) SO = strikeouts The computer output for both the regression and the ANOVA table are given below.

Regression output Coefficients Standard Error t Stat P-value Intercept 90.802 28.151 3.226 0.002 IP 0.840 0.165 5.089 0.000 HB 0.101 0.509 0.200 0.843 BB -0.375 0.143 -2.626 0.011 SO -0.341 0.061 -5.570 0.000 ANOVA of SS MS F p-value Regression 4 9808.487 2452.122 10.982 0.000 Residual 52 11611.233 223.293 Total 56 21419.719