Class for Value 40 in Exclusive Distribution
The value 40 appears THREE times in the raw marks data. In which class interval does it get tallied?
- 30–40 (upper limit of this class)
- 40–50 (lower limit of this class) — Correct Answer
- Both 30–40 and 40–50 (shared equally)
- Neither class — it is excluded
Explanation:
Correct Answer Explanation
Value 40 is tallied in class 40–50 because in exclusive class intervals (upper limit excluded), 40 — being equal to the lower limit of 40–50 — belongs to this class.
Key Rule:
- In the upper limit excluded convention: value equal to lower limit goes into THAT class (40 → 40–50).
- That's why class 30–40 has only 7 values (NOT 9 or 10), because the three 40s go to 40–50.
- This explains why the class 40–50 frequency is 21 (includes the three 40s).
📚 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.
