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The Complete Idiot's Guide to Statistics, 2nd Edition by Robert Donnelly

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Types of Data

Another way to classify data is by one of two types: quantitative or qualitative.
◆ Quantitative data uses numerical values to describe something of interest. An example is Debbie’s age, which I have been forced by a legally bound document to never, never, never reveal anywhere in this book, not even if it’s buried in an appendix as an answer to an obscure question. (Hint: See page 167.)
◆ Qualitative data uses descriptive terms to measure or classify something of interest. One example of qualitative data is the name of a respondent in a survey and his or her level of education. The next section covers qualitative data in more detail.

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