Any variable that can be placed into either of two discrete and mutually exclusive categories is called dichotomous.
A dichotomous variable is one in which, as a result of said variability, there are only two possible outcomes. That is, there is a dichotomy or mutual exclusion between both results of the variable, in such a way that the presence of one result makes the presence of the other null.
An example of dichotomous variables is one in which a certain situation exists or not, that is, where the result varies between 0 and a positive integer.
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