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In a frequency polygon, two consecutive plotted points are (15, 8) and (25, 8).
What does the horizontal (flat) segment between them indicate about these two classes?

Class 9Frequency PolygonsStatistics and Probability
  • AThe two classes have equal frequency
  • BThe second class has zero frequency
  • CThe class size changed
  • DThere is a missing class between them

Step-by-Step Solution

Both points have the same -value (frequency 8), so the segment is horizontal, meaning the two classes have equal frequency.
Answer: A) The two classes have equal frequency

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