The Harmonic Mean of 2 and 4 is: MCQ with Answer and Explanation

The Harmonic Mean of 2 and 4 is:

A. 2.83

B. 2.67

C. 3.5

D. 3

Answer: Option B

HM = 2ab / (a+b) = 2(2)(4) / (2+4) = 16/6 = 2.67.

This question belongs to: Accountancy and Statistics Statistics

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Question #1 Report Error

Infant Mortality Rate is a sensitive indicator of:

A. Industrial development

B. Health and socio-economic conditions

C. Education level

D. Economic growth

Correct Answer: Option B

Explanation:
IMR reflects the quality of healthcare, nutrition, and environmental conditions.

This question belongs to: Accountancy and Statistics Statistics

Question #2 Report Error

The population of a town increased from 20,000 to 25,000 in 10 years. The average annual growth rate is best computed using:

A. Harmonic mean

B. Arithmetic mean of growth rates

C. Geometric mean of growth factors

D. Median growth rate

Correct Answer: Option C

Explanation:
Geometric mean is appropriate for compound growth rates; annual growth factor = (25000/20000)^(1/10).

This question belongs to: Accountancy and Statistics Statistics

Question #3 Report Error

Life tables are primarily used to compute:

A. Fertility rates

B. Life expectancy

C. Population density

D. Migration rates

Correct Answer: Option B

Explanation:
Life tables synthesize mortality rates to derive life expectancy and survival probabilities.

This question belongs to: Accountancy and Statistics Statistics