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# What is a dichotomous variable?

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Dichotomous variables are variables that have two levels. A very common example of a dichotomous variable is gender, which has two outcomes and is reported as male or female.

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Dichotomous variables are part of a larger type of variable called a categorical variable. Categorical variables are not measured by numbers, but they can instead be categorized. Dichotomous variables are any categorical variable that has two distinct outcomes. Survey questions that yield yes or no answers are also examples of dichotomous variables. When formulating hypotheses to test a dichotomous variable, it is essential to test the variables as mutually exclusive. This means that one outcome excludes the possibility of the other outcome.

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## Related Questions

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Normally distributed variables, such as the speed of different automobiles at one spot on the highway, form a bell curve with enough measurements. This bell curve means that most cars of the sample are going roughly the same speed, while the outliers represent faster and slower vehicles.

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Qualitative variables are those with no natural or logical order. While scientists often assign a number to each, these numbers are not meaningful in any way.

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Some examples of continuous variables are measuring people's weight within a certain range, measuring the amount of gas put into a gas tank or measuring the height of people. A continuous variable is any variable that can be any value in a certain range.