When analyzing the data, the researcher treated income as a ratio variable because it has an absolute zero and allows meaningful multiplication and division.

When analyzing survey responses, we treated satisfaction level as an ordinal variable to preserve the natural ranking of the categories.

In our survey, gender is recorded as a nominal variable, so we summarize it with frequency counts rather than means.

Temperature measured in Celsius is often treated as an interval variable in statistical analyses because the magnitudes of differences between values are meaningful even though there may be no true zero point.

When modeling the roll of a die, we treat the outcome as a random variable and compute its expected value.

To compare test scores across classes, the analyst converted each student's raw score into a standardized variable that showed how many standard deviations it was from the mean.

When writing documentation, I often use 'foo' as a metasyntactic variable to represent an unspecified identifier.

The variable antshrike flicked its tail as it foraged beneath the tangled understory, following swarms of ants on the forest floor.

In the equation y = 3x + 5, x is the independent variable because its value does not depend on any other variable.

In the experiment, the dependent variable was the plant's height after four weeks of treatment.