Principle of Class Formation
According to the Recap section, classes should be formed in such a way that the class mark of each class comes as close as possible to:
- The upper class limit of each class
- A value around which the observations in a class tend to concentrate — Correct Answer
- The lowest value in the entire dataset
- The mean of the entire dataset
Explanation:
Correct Answer Explanation
Classes should be formed so that the class mark comes as close as possible to a value around which the observations in a class tend to concentrate.
Key Points:
- This principle ensures minimum loss of information when class marks replace individual values.
- It is why we split dense classes (40–50, 50–60, 60–70) into smaller intervals in unequal class distributions.
- New class marks (42.5, 47.5, 52.5, 57.5, 62.5, 67.5) are closer to actual data concentrations.
- This is a key recap point from the chapter.
📚 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.
