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

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The Harmonic Mean of 2 and 4 is:

A. 3

B. 2.83

C. 3.5

D. 2.67

Answer: Option D

Solution (By JKSSB Mock Tests)

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

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A property of the arithmetic mean is that the sum of squared deviations from the mean is:

A. Minimum

B. Zero

C. Maximum

D. Equal to variance

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Correct Answer: Option A

Explanation:
The arithmetic mean minimizes the sum of squared deviations (Σ(x - x̄)²), a key property underlying least squares estimation in regression and ANOVA.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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Consumer Price Index (CPI) measures changes in:

A. Wholesale prices

B. Industrial production

C. Retail prices of a fixed basket of goods and services

D. Export prices

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Correct Answer: Option C

Explanation:
CPI tracks the average change over time in the prices paid by consumers for a market basket of goods and services.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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The infant mortality rate in India (SRS 2020) is around:

A. 33 per 1000

B. 28 per 1000 live births

C. 50 per 1000

D. 40 per 1000

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Correct Answer: Option B

Explanation:
As per SRS 2020, India's IMR was 28 per 1000 live births.

This question belongs to: Accountancy and Statistics Statistics

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