Variables

What are numerical variables also known as?

Quantitative Data

What do discrete variables represent?

Quantitative variables that can take only a limited number of values.

Give an example of a discrete variable.

Number of motor vehicle accidents in Georgia in a specific month.

What type of variables can take any real numerical value over an interval?

Continuous Variables

What is a key feature of continuous variables?

They are measurable quantities not restricted to specific values.

Provide an example of continuous data.

Blood pressure in mmHg, age, weight in pounds.

What is a categorical variable also known as?

Qualitative Data

What does a nominal variable represent?

Purely qualitative categories without any order.

Provide an example of a nominal variable.

1 = black, 2 = brown, 3 = blonde, 4 = red.

What is a dichotomous or binary variable?

A nominal variable that takes on one of two possible distinct values.

Provide an example of a dichotomous variable.

Gender: 0 = Male, 1 = Female.

What is an ordinal variable?

Qualitative data that has an order or hierarchy.

Give an example of an ordinal variable.

Stages of ovarian cancer, letter grades, Likert scales.

What are Likert scales commonly used for?

Survey research to measure attitudes.

Provide an example of a Likert scale question.

On a scale of 1-10, how much does it hurt?