Question

The class intervals in a grouped frequency distribution should be:
A. Exhaustive
B. Mutually exclusive
Select the correct answer from the following options:

• A. A only
• B. B only
• C. Neither A nor B
• D. Both A and B

Hint:

Exam Tip:
Class intervals must be:
• Exhaustive (cover all values).
• Mutually exclusive (no overlap).
• Equal width is preferred but not mandatory.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
In a grouped frequency distribution, class intervals must be properly defined to ensure each observation falls into exactly one class.

Step 2: Key Requirements:

• Exhaustive: The classes must cover all possible values of the variable.
• Mutually exclusive: Each observation must belong to exactly one class (no overlap).

Step 3: Analyzing the Options:

• (A) A only: Incomplete.
• (B) B only: Incomplete.
• (C) Neither A nor B: False.
• (D) Both A and B: Correct.

Step 4: Final Answer:
Therefore, option (D) is correct.