The CPI for agricultural labourers (CPI-AL) is used to: MCQ with Answer and Explanation
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Question #1
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If a constant 5 is subtracted from all observations, the arithmetic mean:
Correct Answer: Option B
Explanation:
Mean is affected by change of origin; subtracting 5 reduces mean by 5.
Mean is affected by change of origin; subtracting 5 reduces mean by 5.
This question belongs to:
Accountancy and Statistics
Statistics
Question #2
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The combined mean of two groups with n₁=20, mean₁=50 and n₂=30, mean₂=60 is:
Correct Answer: Option A
Explanation:
Combined mean = (20×50 + 30×60) / (20+30) = (1000+1800)/50 = 2800/50 = 56.
Combined mean = (20×50 + 30×60) / (20+30) = (1000+1800)/50 = 2800/50 = 56.
This question belongs to:
Accountancy and Statistics
Statistics
Question #3
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Infant mortality rate and life expectancy at birth are generally:
Correct Answer: Option A
Explanation:
Higher IMR is associated with lower life expectancy.
Higher IMR is associated with lower life expectancy.
This question belongs to:
Accountancy and Statistics
Statistics
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