PRC-2 · Chapter 7 · Question 39 of 60
In a frequency distribution featuring unequal class intervals, the height of a bar in a histogram must be rendered proportional to its:
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: B) Frequency density
Explanation
When class widths are unequal, plotting raw frequencies heavily distorts the visual area. To correct this, the height of the bars must represent the 'frequency density' (Frequency / Class Width).
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