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Summary
In this learning unit, several data classification methods and criteria for selecting an adequate method were examined.
These methods that consider how data are distributed along the dispersion graph (such as Natural Breaks and Optimal) are preferable
because they place similar data values in the same class (rather than similar data values in different classes).
Methods that do not consider the distribution of data along the dispersion graph (such as Equal Intervals and Quantiles) may
however also satisfy other criteria (Slocum 1999).
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