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Chapter 1: Introduction and Graphical Displays
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Definition: Histogram
A histogram is a graphical display of a frequency or relative frequency
distribution that uses classes and vertical (horizontal) bars (rectangles) of
various heights to represent the frequencies.
Following are a couple of notes with regards to the histogram.
Note:
Histograms are useful when the data values are quantitative.
A histogram gives an estimate of the shape of the distribution of the
population from which the sample was obtained.
Example 1-7:
Display the data in
Example 1-3
with a histogram using
seven classes.
Solution:
We can use the
Histogram from Raw Data
workbook to create
the frequency histogram. A histogram with eight classes for the data is
shown in
Figure 1-17
.