Qualitative variation
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Qualitative variation (QV) allows us to assess the degree of statistical dispersion in nominal distributions.
Variance is minimized if all cases belong to a single category and is maximized when all cases are qually distributed across all categories. The lower bound of qualitative variation is 0 - when all cases belong to a single category.
The larger the number of categories and the laeger the differences in frequencies across categories, the larger the variance.
Index of qualitative variation (IQV) is defined as a ratio of observed differences to maximum differences.
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| This page uses content from the English-language version of Wikipedia. The original article was at Qualitative variation. The list of authors can be seen in the page history. As with Psychology Wiki, the text of Wikipedia is available under the GNU Free Documentation License. |
