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The distinction between discrete and continuous variables is important. Categorical variables. The values of a categorical variable are selected from a small group of categories. Examples are gender (male or female) and marital status (never married, married, divorced or widowed).Categorical variables can be further categorised into ordinal and nominal variables. ... Name is a label variable. 2  Sex, Marital Status and Smoking are nominal categorical variables. 3  Age and Income are continuous numerical variables. 4  Number of children is a discrete numerical variable (a count).
a. a categorical variable is nominal if there is natural ordering of its possible values b.a variable is numerical if meaningful arithmetic can be performed on it c. Zip codes are usually treated as categorical variables, although they appear to be numerical d.All of the above. Follow. 1 answer 1.