User Guide

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Chapter 13
Frequencies
Charts
Figure 13-4
Frequencies Charts dialog box
Chart Type. A pie chart displays the contribution of parts to a whole. Each slice of a
pie chart corresponds to a group defined by a single grouping variable. A bar chart
displays the count for each distinct value or category as a separate bar, allowing you
to compare categories visually. A histogram also has bars, but they are plotted along
an equal interval scale. The height of each bar is the count of values of a quantitative
variable falling within the interval. A histogram shows the shape, center, and spread
of the distribution. A normal curve superimposed on a histogram helps you judge
whether the data are normally distributed.
Chart Values. For bar charts, the scale axis can be labeled by frequency counts or
percentages.
Frequencies Format
Figure 13-5
Frequencies Format dialog box