Use a graphic representation to support your conclusions. Describe this distribution:
Answers: a) probability .25
b) probability .65
c) probability .35
4 X X
3 X X X X X X
2 X X X X X X
1 X X X X X X X X
<19 20–24 25–29 30–34 35–39 40–44 45–49 50>
The distribution is skewed slightly right ; it is unimodal, nearly symmetric, and nearly bimodal.
Moving what one data point would make the distribution bimodal and symmetric? Where would the point need to be moved? Note that symmetry does not require the histogram to be unimodal.
©1998 Brooks/Cole Publishing/ITP