dichotomous
(adjective)
dividing or branching into two pieces
Examples of dichotomous in the following topics:
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Averages of Qualitative and Ranked Data
- Examples include, on one hand, dichotomous data with dichotomous (or dichotomized) values such as "sick" versus "healthy" when measuring health, "guilty" versus "innocent" when making judgments in courts, or "wrong/false" versus "right/true" when measuring truth value.
- On the other hand, non-dichotomous data consisting of a spectrum of values is also included, such as "completely agree," "mostly agree," "mostly disagree," and "completely disagree" when measuring opinion .
- An opinion survey is an example of a non-dichotomous data set on the ordinal scale for which the central tendency can be described by the median or the mode.
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Collecting and Measuring Data
- Examples of ordinal data include dichotomous values such as "sick" versus "healthy" when measuring health, "guilty" versus "innocent" when making judgments in courts, "false" versus "true", when measuring truth value.
- Examples also include non-dichotomous data consisting of a spectrum of values, such as "completely agree", "mostly agree", "mostly disagree", or "completely disagree" when measuring opinion.
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Comparing Two Populations: Paired Difference Experiment
- It is applied to $2 \times 2$ contingency tables with a dichotomous trait, with matched pairs of subjects, to determine whether the row and column marginal frequencies are equal ("marginal homogeneity").
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Distribution-Free Tests
- McNemar's test: tests whether, in $2 \times 2$ contingency tables with a dichotomous trait and matched pairs of subjects, row and column marginal frequencies are equal.