Refer to the study in given Example that compares ages at death for left-handed and right-handed people. Draw a figure similar to one of Figures that illustrates the steps for Example.
Example
Do Left-Handers Die Young? Many years ago, a highly publicized study pronounced that left-handed people did not live as long as right-handed people (Coren and Halpern, 1991). In one part of the study, the researchers sent letters to next of kin for a random sample of recently deceased individuals, asking which hand the deceased had used for writing, drawing, and throwing a ball.