A survey records many variables of interest to the researchers conducting the survey. The following are some of the variables from a survey conducted by the USDA. Which of these variables is categorical?

a. The total farm income, before taxes, in 1993.
b. The number of acres owned
c. The number of children under the age of 12 on the farm
d. The type of grain grown

The correct option is D

Step-by-step explanation:

A categorical variable is a variable that can take on one of a limited, and usually fixed, number of possible values, assigning each individual or other unit of observation to a particular group or nominal category on the basis of some qualitative property. Example of categorical variables are race, sex group and education level.

15 units use socratic

step-by-step explanation: 15 units