Which of the following index numbers does NOT require weights? MCQ with Answer and Explanation
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Question #1
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When the base year of a fixed base index series is changed from 2010 to 2015, the new index for 2020 is obtained by:
Correct Answer: Option B
Explanation:
New index = (Old index for target year / Old index for new base year) × 100.
New index = (Old index for target year / Old index for new base year) × 100.
This question belongs to:
Accountancy and Statistics
Statistics
Question #2
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If P(A)=0.7, P(B)=0.6, and the maximum possible value of P(A∩B) is 0.6, then the minimum possible value of P(A∪B) is:
Correct Answer: Option D
Explanation:
P(A∪B) = P(A)+P(B)-P(A∩B). To minimize union, maximize intersection: max=0.6. So min union = 0.7+0.6-0.6=0.7.
P(A∪B) = P(A)+P(B)-P(A∩B). To minimize union, maximize intersection: max=0.6. So min union = 0.7+0.6-0.6=0.7.
This question belongs to:
Accountancy and Statistics
Statistics
Question #3
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Yule's coefficient of association (Q) for attributes A and B ranges between:
Correct Answer: Option B
Explanation:
Yule's Q = [(AB)(αβ) - (Aβ)(αB)] / [(AB)(αβ) + (Aβ)(αB)], which ranges from -1 (perfect negative association) to +1 (perfect positive association), with 0 indicating independence.
Yule's Q = [(AB)(αβ) - (Aβ)(αB)] / [(AB)(αβ) + (Aβ)(αB)], which ranges from -1 (perfect negative association) to +1 (perfect positive association), with 0 indicating independence.
This question belongs to:
Accountancy and Statistics
Statistics
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