In a frequency distribution with exclusive class intervals 0-10, 10-20, 20-30, a value exactly equal to 20 should be included in: MCQ with Answer and Explanation

Question

In a frequency distribution with exclusive class intervals 0-10, 10-20, 20-30, a value exactly equal to 20 should be included in:

A. Either 10-20 or 20-30

B. 10-20

C. Excluded from both

D. 20-30

Answer: Option D

Solution (By JKSSB Mock Tests)

In exclusive classification, the upper limit is excluded; thus 20 belongs to the class 20-30.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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The method of collecting primary data where the informant is contacted through telephone is called:

A. Telephonic interview

B. Mailed questionnaire

C. Indirect oral investigation

D. Direct personal interview

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Correct Answer: Option A

Explanation:
Telephonic interview involves asking questions over the phone.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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The geometric mean of 1, 2, 4, 8, 16 is:

A. 6

B. 4

C. 3.5

D. 5.2

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Correct Answer: Option B

Explanation:
Product = 1×2×4×8×16 = 1024. 1024^(1/5) = 4 (since 4^5=1024).

This question belongs to: Accountancy and Statistics Statistics

Question #3

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If a constant 5 is subtracted from all observations, the arithmetic mean:

A. Remains same

B. Becomes 5 times

C. Decreases by 5

D. Increases by 5

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Correct Answer: Option C

Explanation:
Mean is affected by change of origin; subtracting 5 reduces mean by 5.

This question belongs to: Accountancy and Statistics Statistics

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