Frequency Distributions for Qualitative Data

Qualitative data is a categorical measurement expressed not in terms of numbers, but rather by means of a natural language description.

Graphs of distributions created by others can be misleading, either intentionally or unintentionally.

Qualitative data can be graphed in various ways, including using pie charts and bar charts.

A misleading graph misrepresents data and may result in incorrectly derived conclusions.

Qualitative frequency distributions can be displayed in bar charts, Pareto charts, and pie charts.

In statistical formulas that involve summing numbers, the Greek letter sigma is used as the summation notation.

We can learn much more by displaying bivariate data in a graphical form that maintains the pairing of variables.