Statistics: Presentation of Data · Class 11 · CBSE · Commerce Economics
A continuous frequency distribution has the following classes and frequencies: 0–10: 20, 10–30: 30, and 30–40: 10. If a histogram is drawn for these…
Practice question from Statistics: Presentation of Data (Class 11 · CBSE · Commerce Economics), with the correct answer and a step-by-step solution.
hard · MCQ · Q-1ABD9F
A continuous frequency distribution has the following classes and frequencies: 0–10: 20, 10–30: 30, and 30–40: 10. If a histogram is drawn for these unequal class intervals, what should be the relative heights of the three rectangles, using frequency density as height?
- A.2, 1.5, 1Correct answer
- B.20, 30, 10
- C.1, 2, 1.5
- D.10, 20, 10
Solution
For unequal class widths, histogram height is based on frequency density, calculated as frequency divided by class width. The densities are , , and .
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