Question: In the following scatterplot of the Ca pump data of Exercise 12.2.10, one of the points is marked with an X. In addition, there are

In the following scatterplot of the Ca pump data of Exercise 12.2.10, one of the points is marked with an "X." In addition, there are two regression lines on the plot: The solid line includes all of the data and the dashed line omits the point marked "X."
(a) Would we consider the point marked "X" an outlier? Explain.
(b) Would we consider the point marked "X" a leverage point? Explain.
(c) Noting the very small change in the slopes of the dashed and solid lines, would we consider the point marked "X" an influential observation? Explain.

4000-1 3500 3000 2500 2000 1500 Maternal hair Hg level (ug/g)

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