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Chapter 1: Introduction and Graphical Displays
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Notes:
If the relative frequencies or the equivalent percentages are plotted
along the vertical axis to produce a relative frequency or percent
histogram, the shape of the resulting histogram will be the same as
that of a histogram in which the frequencies were plotted along the
vertical axis.
This is true because the relative frequencies are obtained by dividing
the frequency values by the total number of values in the data set.
Figure 1-18
shows the frequency and the relative frequency histogram for
the data given in
Example 1-3
with the relative frequencies plotted along the
vertical axis. Observe that the shapes of the frequency histogram and the
relative frequency histogram in
Figure 1-18
are identical in shapes. To
obtain a histogram and relative frequency histogram display together you
can use the
Frequency and Relative Frequency Histogram with Table
workbook
to generate the two graphs together.