Chapter 8, Problem 26E

More unusual points Each of the following scatterplots shows a cluster of points and one “stray” point. For each, answer these questions:

1. 1) In what way is the point unusual? Does it have high leverage, a large residual, or both?
2. 2) Do you think that point is an influential point?
3. 3) If that point were removed, would the correlation become stronger or weaker? Explain.
4. 4) If that point were removed, would the slope of the regression line increase or decrease? Explain.