Explain what is meant by degrees of freedom.
Step 1 of 5) Explain what is meant by degrees of freedom. The inclusion of Bubba Watson in the data set causes the slope of the regression line to decrease (from 3.1661 to 2.2287) and the y-intercept to increase substantially (from -55.80 to +39.46). In other words, the Bubba data pulls the least-squares regression line toward his observation. Look at the scatter diagram in Figure 27. Notice that Bubba’s shot has high leverage and a large residual (based on predictions using the “without Bubba” line. Therefore, Bubba’s data point is influential.