Frequency Density Formula
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Question (English)
Frequency density is calculated as:
- Class frequency × Width of class interval
- Class frequency ÷ Width of class interval ✓ Correct
- Width of class interval ÷ Class frequency
- Class frequency + Width of class interval
Explanation:
Correct Answer Explanation
Frequency density = Class frequency ÷ Width of class interval.
Key Points:
- Used when class intervals are unequal in a histogram.
- Ensures that areas of rectangles remain proportional to frequencies.
- When intervals are equal, absolute frequency can be used directly.
- Frequency density gives comparable measurements across unequal classes.
Why Other Options Are Wrong
- A. Multiplication: This would exaggerate wider classes.
- C. Width ÷ Frequency: This is the inverse of the correct formula.
- D. Addition: This has no statistical meaning.
📚 About this Topic — CH-4: Presentation of Data
This multiple choice question is from CH-4: Presentation of Data, NCERT Books, Statistics for Economics. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from CH-4: Presentation of Data to strengthen your preparation.
