mode

Mode

The value that appears most frequently in a dataset.

When you'd see it: Most common in categorical data: the modal payment method is credit card; the modal support ticket category is billing. Occasionally in discrete numeric data. Rarely in continuous data where exact repeats are uncommon.

Why it matters: The mode is the only measure of central tendency that works for categorical data — you can't average payment methods, but you can find the most common one. It also identifies cluster peaks: a bimodal distribution (two modes) suggests two distinct subpopulations in the data.

Common mistakes: Applying the mode to continuous data where every value may appear only once. For continuous distributions, bin the data first and find the modal bin, or use the peak of a density estimate.

Related mean, median, normal distribution