Take me out to the ball game. In baseball a teams success is often thought to be a function of the team's hitting and pitching performance. One measure of hitting performance is the number of home runs that team hits, and one measure of pitching performance is the earned run average for the teams pitching staff. It is generally believed that teams that hit more home runs and have a lower earned run average will win a higher percentage of games played. The following data show the proportion of games won, the number of home runs (HR), and the earned run average (ERA) for the 16 teams in the National League for the 2003 Major League Baseball season. Team Won HR ERA Arizona 0.519 152 3.857 Atlanta 0.623 235 4.106 Chicago 0.543 172 3.842 Cincinnati 0.426 182 5.127 Colorado 0.457 198 5.269 Florida 0.562 157 4.059 Houston 0.537 191 3.880 Los Angeles 0.525 124 3.162 Milwaukee 0.420 196 5.058 Montreal 0.512 144 4.027 New York 0.410 124 4.517 Philadelphia 0.531 166 4.072 Pittsburgh 0.463 163 4.664 San Diego 0.395 128 4.904 San Francis 0.621 180 3.734 St Louis 0.525 196 4.642