Formula for Class Interval
The Class Interval or Class Width is calculated as:
- Upper Class Limit + Lower Class Limit
- Upper Class Limit × Lower Class Limit
- Upper Class Limit − Lower Class Limit — Correct Answer
- (Upper Class Limit + Lower Class Limit) / 2
Explanation:
Correct Answer Explanation
Class Interval = Upper Class Limit − Lower Class Limit
Example:
- For class 60–70: Class Interval = 70 − 60 = 10
- For class 40–50: Class Interval = 50 − 40 = 10
Important Distinction:
- Class Interval = UCL − LCL (width/size of class)
- Class Mark = (UCL + LCL) / 2 (middle value of class)
- Range = Largest value − Smallest value (overall spread of data)
📚 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.
