The harmonic mean of 2, 3, and 6 is: MCQ with Answer and Explanation
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Question #1
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The harmonic mean of 4 and 12 is:
Correct Answer: Option B
Explanation:
HM = 2 / (1/4 + 1/12) = 2 / (4/12) = 2 / (1/3) = 6.
HM = 2 / (1/4 + 1/12) = 2 / (4/12) = 2 / (1/3) = 6.
This question belongs to:
Accountancy and Statistics
Statistics
Question #2
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To find the average of proportions, ratios, and percentages, the most appropriate mathematical average is:
Correct Answer: Option A
Explanation:
Geometric mean is mathematically the only correct average for analyzing multiplicative processes like ratios and percentages.
Geometric mean is mathematically the only correct average for analyzing multiplicative processes like ratios and percentages.
This question belongs to:
Accountancy and Statistics
Statistics
Question #3
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In a Poisson distribution, the probability of zero successes is e^{-λ}. If λ=3, this probability is approximately:
Correct Answer: Option D
Explanation:
e^{-3} ≈ 0.0498 ≈ 0.05.
e^{-3} ≈ 0.0498 ≈ 0.05.
This question belongs to:
Accountancy and Statistics
Statistics
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