The arithmetic mean of a data set is not a good representative if: MCQ with Answer and Explanation

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The arithmetic mean of a data set is not a good representative if:

A. Data are normally distributed

B. Data are large

C. Data are symmetric

D. Data have extreme outliers

Answer: Option D

Solution (By JKSSB Mock Tests)

Outliers distort the mean; median is preferred in such cases.

This question belongs to: Accountancy and Statistics Statistics

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Practice More Statistics Questions

Question #1

The crude birth rate in India has declined primarily due to:

A. Increase in migration

B. Family planning and socio-economic development

C. Increase in death rate

D. Decrease in female population

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Correct Answer: Option B

Explanation:
Awareness, contraception, and rising education have reduced birth rates.

This question belongs to: Accountancy and Statistics Statistics

Question #2

If a population has a high proportion of young people, the crude death rate may be low even if age-specific rates are high. This is an example of:

A. Age structure effect

B. Direct standardization

C. Reverse causality

D. Sampling error

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Correct Answer: Option A

Explanation:
A young population has fewer old people where mortality is high, thus CDR can be low.

This question belongs to: Accountancy and Statistics Statistics

Question #3

Population density is typically measured as the number of persons per:

A. Cubic kilometer

B. Square kilometer

C. Thousand total population

D. Square meter

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Correct Answer: Option B

Explanation:
Population density evaluates spatial distribution, usually expressed as persons per square kilometer (or square mile).

This question belongs to: Accountancy and Statistics Statistics

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