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58

Chapter 1: Introduction and Graphical Displays

An example of a time plot for grouped data is shown in

Figure 1-28.

We

can use the

Time Series Plot for Grouped Data

workbook to create such

graphs.

Figure 1-28:

Time series plot for grouped data

Section Review

1-10 Pie Graphs or Pie Charts

A pie chart allows us to observe the proportions of sectors relative to the

entire data set. It can be used to display qualitative data as well as

quantitative data. However, categorical or qualitative data readily lend

themselves to this type of graphical display because of the inherent

e-Self Review