Suggested answer to exercise: Arm circumference of students, 7

Question 7: 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.


Back to Exercise: Arm circumference of students.

To Clinical Biostatistics index.

To Martin Bland's M.Sc. index.

To Martin Bland's home page.

This page maintained by Martin Bland.
Last updated: 31 July, 2006.

Back to top.