Question

A sample of breakfast cereals was classified as either a hot or cold cereal. In addition, the number of calories/serving and grams of fat/serving (integer values) were measured. It was also recorded whether each cereal meets the daily nutritional requirements for iron, using the following scale: 0 = does not meet daily nutritional requirements for iron; 1 = meets not more than 25% of daily nutritional requirements for iron; 2 = meets more than 25% of daily nutritional requirements for iron. Which of the following is correct?

a.The number of calories/serving is a quantitative variable.
b.The measurement of "meets daily nutritional requirements for iron" is a quantitative variable.
c.The variable "hot/cold" is a quantitative variable.
d.The variable "grams of fat" is a categorical variable.

Answer 1

a.The number of calories/serving is a quantitative variable.

Explanation:

A categorical variable, also called nominal variable, is a variable that has two or more categories, but there is no intrinsic ordering to the categories.property.

A quantitative variable is a variable which can have some numerical value i.e. it can be represented in numbers. Arithmetic operations can also be performed on quantitative variables.

The number of calories and grams of fat can take numerical values, that makes them a quantitative variable.

The variables "hot/cold" and the measurement of "meets daily nutritional requirements for iron" are categorical variables, they do not take numerical values.

Option A is the only correct option