Exercise

Estimation with and without outlier

The data provided in this exercise (hypdata_outlier) has an extreme outlier. A plot is shown of the dataset, and a linear regression model of response versus explanatory. You will remove the outlying point to see how one observation can affect the estimate of the line.

Instructions

100 XP
  • Filter hypdata_outlier to remove the outlier.
  • Update the plot, p, to add another smooth layer (use geom_smooth).
    • Like the other ribbon, the update should use the linear regression method, and not draw the ribbon.
    • Unlike the other ribbon, the update should use the data = hypdata_no_outlier and be colored red.
    • For now, just use the smooth curve, and not the confidence bounds (se = FALSE).