Formula for Class Mark
The Class Mid-Point or Class Mark is calculated by which formula?
- Upper Class Limit − Lower Class Limit
- Upper Class Limit × Lower Class Limit
- (Upper Class Limit + Lower Class Limit) / 2 — Correct Answer
- Upper Class Limit / Lower Class Limit
Explanation:
Correct Answer Explanation
Class Mark = (Upper Class Limit + Lower Class Limit) / 2
Examples:
- Class 0–10: Class Mark = (0+10)/2 = 5
- Class 40–50: Class Mark = (40+50)/2 = 45
- Class 90–100: Class Mark = (90+100)/2 = 95
Key Points:
- Class mark lies halfway between the lower and upper class limits.
- Once data is grouped into classes, class mark is used to represent the class in further statistical calculations.
- Individual observations are not used in further calculations once data is classified.
📚 About this Topic — CH-3: Organisation of Data
This multiple choice question is from CH-3: Organisation of Data, NCERT Books, Statistics for Economics. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from CH-3: Organisation of Data to strengthen your preparation.
