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A frequency distribution of pocket money (in Rs) of Class 9 students has unequal class sizes.
Why might a plain frequency polygon (using raw frequencies) be misleading here?

Class 9Frequency PolygonsStatistics and Probability
  • ABecause heights are not adjusted for differing class widths
  • BBecause class marks cannot be found
  • CBecause frequencies must be negative
  • DBecause polygons need equal frequencies

Step-by-Step Solution

With unequal class sizes, raw frequency does not reflect concentration; heights should be adjusted (like frequency density) for fair comparison, otherwise the polygon misleads.
Answer: A) Because heights are not adjusted for differing class widths

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