Histogram Variable Type

Histogram can only be drawn for:

Correct Answer Explanation

Histogram is drawn only for a continuous variable.

Key Points:

• Bar diagrams can be drawn for both discrete and continuous variables, but histogram is only for continuous.
• In histograms, no space is left between two consecutive rectangles because class boundaries are continuous.
• If classes are not continuous, they must be first converted into continuous classes.
• This is a key difference between bar diagram and histogram.

Why Other Options Are Wrong

• A. Discrete variables: Bar diagrams are used for discrete variables, not histograms.
• C. Both: Histograms require continuous data; bar diagrams can handle both.
• D. Qualitative attributes: Qualitative data is shown through bar or pie diagrams.