Suggested answer to exercise: Eye colour and sex, 1

Question 1: What kind of variable is eye colour? What kind of variable is sex?

Suggested answer

Eye colour is qualitative variable, also called a categorical variable. The categories are not ordered. Such a variable is also called nominal.

Sex is also a qualitative variable. Because there are only two categories, it is also called dichotomous or binary.

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Last updated: 31 July, 2006.

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