If a die is rolled, the sample space is: MCQ with Answer and Explanation
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Question #1
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If P(A)=0.5, P(B)=0.4, and A and B are independent, P(A∩B) is:
Correct Answer: Option B
Explanation:
For independent events, P(A∩B) = P(A) × P(B) = 0.5 × 0.4 = 0.2.
For independent events, P(A∩B) = P(A) × P(B) = 0.5 × 0.4 = 0.2.
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Accountancy and Statistics
Statistics
Question #2
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Consider the following statements about primary data: 1. It is collected directly by the investigator. 2. It is always more reliable than secondary data. 3. It is economical in terms of time and cost. Which of the statements is/are correct?
Correct Answer: Option C
Explanation:
Primary data is collected firsthand (1 correct). It is not necessarily more reliable than secondary data, and it is more expensive and time-consuming (2,3 false).
Primary data is collected firsthand (1 correct). It is not necessarily more reliable than secondary data, and it is more expensive and time-consuming (2,3 false).
This question belongs to:
Accountancy and Statistics
Statistics
Question #3
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If a dataset has a mean of 100 and a coefficient of variation of 20%, the standard deviation is:
Correct Answer: Option B
Explanation:
Coefficient of variation (CV) = (SD / Mean) × 100. So 20 = (SD / 100) × 100 → SD = 20. CV standardizes dispersion relative to the mean.
Coefficient of variation (CV) = (SD / Mean) × 100. So 20 = (SD / 100) × 100 → SD = 20. CV standardizes dispersion relative to the mean.
This question belongs to:
Accountancy and Statistics
Statistics
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