1.For National League teams in 2010, yhat = -6.25 + 41.5 x where y=team scoring per game and x is the team batting average for the American League Teams.

Software reports r2 = 0.81. Interpret this measure.

The confidence interval for the slope is (-3.4, 79.6). Interpret the slope and the significance. How is the confidence interval related to the hypothesis test in a regression? Using this confidence interval, what can you say about corresponding hypothesis test? *hint: what is the null hypothesis and what is the alternate hypothesis?