To do these exercises, go to www.macmillanhighered.com/fapp10e.

Question 5.104

1. The Mean and Median applet allows you to place observations on a line and see their mean and median visually.

  1. Place two observations on the line by clicking below it. Why does only one arrow appear?
  2. Now move the rightmost point close to the other point. (Place the cursor on the point, hold down the mouse button, and drag the point.) Add a third point that is somewhat to the right of the other two. Pull the single rightmost observation out to the right. How does the mean behave? How does the median behave? Explain briefly why each measure acts as it does.