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Michael Friendly

Framework for Categorical Data Analysis

Methods of analysis of categorical data fall into two categories:(1)
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(1) After Koch & Stokes (1991).
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Graphical methods for categorical data

Getting information from a table is like extracting sunlight from a cucumber. Fahrquar & Fahrquar (1891).
You can see a lot, just by looking. Yogi Berra.
Graphical methods for quantitative data are well-developed. From the basic display of data in a scatterplot, to diagnostic methods for assessing assumptions and finding transformations, to the final presentation of results, graphical techniques are commonplace adjuncts to most methods of statistical analysis. Graphical methods for categorical data are still in infancy. There are not many methods, and they are not widely used. Wondering why this is provokes several thoughts:
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© 1995 Michael Friendly
Email: <friendly@yorku.ca>