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36

Chapter 1: Introduction and Graphical Displays

Figure 1-17:

Histogram with eight classes for

data in

Example 1-3

The histogram shows the frequency count for each class and with each class

having a class width of size 10.

Observe from the histogram in

Figure 1-17

that there is a frequency count of

1 for the interval [85 – 95), a frequency count of 4 for the interval

[105 – 115), etc. From this information, we can construct a grouped

frequency distribution with eight classes similar to

Example 1-3

. Observe

such a group frequency distribution will be displayed on the left hand side of

the histogram when the workbook is used.

Click here for the Histogram with Table from Raw Data Workbook