The median value for the United States as a whole is first given, then for each of nine geographical divisions, and finally a separation of the "Seven Cotton States" is made.

Chapter 14 PICTORIAL UNIT BAR CHARTS

IN A pictorial unit bar chart comparisons are made by using a number of symbols, each of which represents a specific value. Synonyms for pictorial unit bar charts are pictogram, pictograph. The advantage of the pictorial unit chart over a chart in which large and small units are used is that there is a variation in one dimension only.

One R9«ire-2,000 MiKowitm

mmmmimm -•'

in2

7.738

iiii

mm

iumm

8.072 8.000

A Millionaire Is Defined Here as a

Person WHt) an Annual Income of $50,000 or More

10.502

18.196

Chicago Tribune. The 1038 Chart Book."

Number of Millionaires in the United States in Selected Years.

1. The reason for classifying this as a bar chart is readily seen. The rows of men create

bars.

2. Since fractions are difficult to present in this form, the numerical value of each row of

figures is given.

3. It might have been better to leave more space between the 1929 row and the 1932 row,

since all the others are consecutive years.

4. As it appeared in the original, the 1936 row was at the top and the 1929 row at the

bottom. Because it is general practice to read years from the top down, the rows were reversed.

GRAPHIC PRESENTATION

SEPTEMBER

OCTOBER

NOVEMBER

OECEMBEP

JANUARY