Which characteristic of primary data distinguishes it most fundamentally from secondary data? MCQ with Answer and Explanation
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Question #1
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Which of the following statements about the Census of India is correct?
Correct Answer: Option D
Explanation:
Indian census uses the de jure (usual residence) method. It is decennial, covers whole country, collects literacy.
Indian census uses the de jure (usual residence) method. It is decennial, covers whole country, collects literacy.
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Accountancy and Statistics
Statistics
Question #2
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If P(A) = 0.3, P(B) = 0.4, and A and B are independent, P(A ∪ B) is:
Correct Answer: Option C
Explanation:
For independent events, P(A∩B)=P(A)P(B)=0.3×0.4=0.12. Then P(A∪B)=P(A)+P(B)-P(A∩B)=0.3+0.4-0.12=0.58, applying the addition theorem with the independence condition.
For independent events, P(A∩B)=P(A)P(B)=0.3×0.4=0.12. Then P(A∪B)=P(A)+P(B)-P(A∩B)=0.3+0.4-0.12=0.58, applying the addition theorem with the independence condition.
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Accountancy and Statistics
Statistics
Question #3
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For inclusive class intervals like 10-19, 20-29, the true class boundaries are obtained by:
Correct Answer: Option D
Explanation:
Inclusive series have gaps; adjusting by half the gap (0.5) gives continuous boundaries: 9.5-19.5, 19.5-29.5, etc.
Inclusive series have gaps; adjusting by half the gap (0.5) gives continuous boundaries: 9.5-19.5, 19.5-29.5, etc.
This question belongs to:
Accountancy and Statistics
Statistics
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