Which measure of central tendency is undefined for data containing zero? MCQ with Answer and Explanation

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Which measure of central tendency is undefined for data containing zero?

A. Median

B. Geometric mean

C. Arithmetic mean

D. Harmonic mean

Answer: Option D

Solution (By JKSSB Mock Tests)

Harmonic mean involves reciprocals; if any value is zero, reciprocal is infinite, so it's undefined.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

Given P(A)=0.5, P(B)=0.3, P(A∩B)=0.1. Are A and B independent?

A. Yes, because they are mutually exclusive

B. No, because 0.1 ≠ 0.15

C. Cannot determine

D. Yes, because P(A∩B)=P(A)P(B)

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Correct Answer: Option B

Explanation:
P(A)P(B)=0.5×0.3=0.15 ≠ 0.1, so not independent.

This question belongs to: Accountancy and Statistics Statistics

Question #2

The dependency ratio is the ratio of:

A. Children to elderly

B. Male to female population

C. Working population to total population

D. Dependent population (0-14 and 65+) to working-age population (15-64)

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Correct Answer: Option D

Explanation:
Dependency ratio = (population 0-14 + 65+) / (population 15-64), measuring economic burden.

This question belongs to: Accountancy and Statistics Statistics

Question #3

The median of 12, 15, 11, 18, 20 is:

A. 15

B. 20

C. 18

D. 11

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Correct Answer: Option A

Explanation:
Ordered: 11, 12, 15, 18, 20. Median = 15 (middle value).

This question belongs to: Accountancy and Statistics Statistics

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