In the March Current Population Survey, women are asked how many children they have. Results are shown below for women age 25-39, by educational level.

(a) Is the number of children discrete or continuous?

(b) Draw histograms for these data. (You may take "5 or more" as 5-very few women had more than 5 children.)

(c) What do you conclude?

Distribution of women age 25-39 by educational level and number of children (percent).

Number of Women who are Women with children high-school graduates college degrees 0

30.2 47.9 1

21.8 19.4 2

28.4 22.7 3

13.7 8.0 4

4.4 1.5 5 or more 1.5 0.5 Note: High-school graduates with no further education. College degrees at the level of a B.A. or B.Sc. Own, never-married children under the age of 18. Per-

cents may not add to 100%, due to rounding.

Source: March 2005 Current Population Survey: CD-ROM supplied by the Bu-

reau of the Census.

The answers to these exercises are on p. A47. P-968