Which of the following is NOT a source of demographic data? MCQ with Answer and Explanation
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Question #1
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If NRR = 1, the population is:
Correct Answer: Option D
Explanation:
NRR of 1 indicates replacement level fertility, leading to zero population growth eventually.
NRR of 1 indicates replacement level fertility, leading to zero population growth eventually.
This question belongs to:
Accountancy and Statistics
Statistics
Question #2
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For two events, P(A)=0.4, P(B)=0.3, and P(A∩B)=0.12. Which of the following is true?
Correct Answer: Option A
Explanation:
0.4×0.3=0.12, so independent. Mutually exclusive would need 0. P(A∪B)=0.4+0.3-0.12=0.58.
0.4×0.3=0.12, so independent. Mutually exclusive would need 0. P(A∪B)=0.4+0.3-0.12=0.58.
This question belongs to:
Accountancy and Statistics
Statistics
Question #3
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For a dataset, if all values are multiplied by a constant k, the new arithmetic mean is:
Correct Answer: Option B
Explanation:
Mean is linear: if x̄ is original mean, new mean = Σ(kx)/n = kΣx/n = kx̄. This property is useful for unit conversions (e.g., meters to centimeters).
Mean is linear: if x̄ is original mean, new mean = Σ(kx)/n = kΣx/n = kx̄. This property is useful for unit conversions (e.g., meters to centimeters).
This question belongs to:
Accountancy and Statistics
Statistics
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