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 symmetric

B. Data have extreme outliers

C. Data are large

D. Data are normally distributed

Answer: Option B

Solution (By JKExamLibrary)

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

This question belongs to: Accountancy and Statistics Statistics

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Question #1 Report Error

The condition (A) ≥ (AB) is necessary for:

A. Zero association

B. Independence

C. Consistency of data

D. Negative association

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Correct Answer: Option C

Explanation:
Consistency requires that marginal frequencies are not less than the joint frequencies.

This question belongs to: Accountancy and Statistics Statistics

Question #2 Report Error

In a frequency distribution, if the class marks are 5, 15, 25, 35, the class width is:

A. 5

B. 20

C. 15

D. 10

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Correct Answer: Option D

Explanation:
Difference between successive class marks = 15-5 = 10, so width = 10.

This question belongs to: Accountancy and Statistics Statistics

Question #3 Report Error

The term 'demographic transition' refers to:

A. Shift from high birth and death rates to low birth and death rates

B. Change in age structure only

C. Migration from rural to urban areas

D. Increase in population density

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Correct Answer: Option A

Explanation:
Demographic transition is the historical shift from high fertility/mortality to low fertility/mortality.

This question belongs to: Accountancy and Statistics Statistics

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