Question 1

Which of the following best describes a quantitative variable?

Accepted Answer

A variable that is numerical in nature and can have mathematical operations performed on it.

Question 2

Which of the following is an example of a discrete variable?

Accepted Answer

The number of penguins in a group.

Question 3

A researcher records the color of cars in a parking lot. What type of variable is this?

Accepted Answer

Qualitative, nominal

Question 4

Which of the following variables is best classified as binary?

Accepted Answer

Whether or not you are late to class.

Question 5

Which of the following statements about continuous variables is TRUE?

Accepted Answer

Continuous variables can take any value within a range, including decimals.

Question 6

A marathon organizer records the finishing positions of runners (1st, 2nd, 3rd, etc.). What type of variable is this?

Accepted Answer

Qualitative, ordinal

Question 7

Which of the following is NOT a characteristic of nominal variables?

Accepted Answer

Mathematical operations like addition and subtraction can be performed on them.

Question 8

Suppose you are measuring the amount of rainfall in inches over a year. Which type of variable is this?

Accepted Answer

Quantitative, continuous

Question 9

Which of the following best describes an ordinal variable?

Accepted Answer

A variable where the order of values is meaningful.

Question 10

A hospital records the blood type of each patient (A, B, AB, O). What type of variable is blood type?

Accepted Answer

Qualitative, nominal

Question 11

Which of the following is a real-world example of a binary variable?

Accepted Answer

Whether a light switch is ON or OFF.

Question 12

If a variable can take on any value between two points, including decimals, it is best described as:

Accepted Answer

Continuous

Question 13

Which of the following variables is most likely to be measured as discrete?

Accepted Answer

Number of students in a classroom

Question 14

A survey asks respondents to rate their satisfaction as 'Unsatisfied', 'Neutral', or 'Satisfied'. What type of variable is this?

Accepted Answer

Qualitative, ordinal

Question 15

Which of the following best describes the process of statistics?

Accepted Answer

The process of gathering and analyzing data into observable conclusions.

Question 16

Which of the following is NOT a type of qualitative variable?

Accepted Answer

Continuous

Question 17

A teacher records the final grades of students as A, B, C, D, or F. What type of variable is this?

Accepted Answer

Qualitative, ordinal

Question 18

Which of the following variables is best described as nominal?

Accepted Answer

The brand of smartphone someone uses.

Question 19

Which of the following is a key difference between ordinal and nominal variables?

Accepted Answer

Ordinal variables have a meaningful order, while nominal variables do not.

Question 20

A scientist measures the age of trees in a forest. What type of variable is age?

Accepted Answer

Quantitative, continuous

Types of Variables in Statistics: Foundations and Classifications

Study Guide - Practice Questions