Repeat the previous exercise using x = percent with at least a high school education. This shows that an outlier is not especially influential if its x-value is not relatively large or small.

Repeat the previous exercise

For the U.S. Statewide Crime data file on the book’s website, let y = violent crime rate and x = percent with a college education.

a.  Construct a scatterplot. Identify any points that you think may be influential in a regression analysis.
b.  Fit the regression line, using all 51 observations. Interpret the slope.
c.  Fit the regression line after deleting the observation identified in part a. Interpret the slope and compare results to part b.