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CA Foundation · Quantitative Aptitude · Statistical Description of Data

In a histogram drawn for a continuous frequency distribution with equal class widths, the height of each rectangle is proportional to:

The height of each rectangle in a histogram with equal class widths is proportional to the class frequency. Because the widths are equal, area and height both reflect frequency. Cumulative frequencies are plotted in ogives, not in histograms.

  1. AThe class frequencyCorrect
  2. BThe class mark
  3. CThe cumulative frequency
  4. DThe upper class limit

Explanation

With equal class widths, the area of a rectangle is proportional to its height, so the height is drawn proportional to the class frequency. The cumulative frequency is used for ogives, not for histograms. Class mark and upper limit are positions on the x-axis, not heights.

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