If each value in a dataset is increased by 10, which of the following measures remains unchanged? MCQ with Answer and Explanation
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Question #1
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The primary measure of inflation used by RBI for monetary policy is:
Correct Answer: Option B
Explanation:
RBI adopted the CPI (Combined) as the key measure of inflation for policy targets.
RBI adopted the CPI (Combined) as the key measure of inflation for policy targets.
This question belongs to:
Accountancy and Statistics
Statistics
Question #2
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In a factory, machines A, B, and C produce 30%, 45%, and 25% of total output, with defect rates of 2%, 3%, and 4% respectively. If a randomly selected item is defective, the probability it was produced by machine B is approximately:
Correct Answer: Option A
Explanation:
Using Bayes' theorem: P(B|Defective) = [P(Defective|B) × P(B)] / [Σ P(Defective|machine) × P(machine)] = (0.03×0.45) / (0.02×0.30 + 0.03×0.45 + 0.04×0.25) = 0.0135 / 0.0315 ≈ 0.4286 ≈ 0.43.
Using Bayes' theorem: P(B|Defective) = [P(Defective|B) × P(B)] / [Σ P(Defective|machine) × P(machine)] = (0.03×0.45) / (0.02×0.30 + 0.03×0.45 + 0.04×0.25) = 0.0135 / 0.0315 ≈ 0.4286 ≈ 0.43.
This question belongs to:
Accountancy and Statistics
Statistics
Question #3
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The probability of obtaining a sum of 9 in a single throw of two dice is:
Correct Answer: Option A
Explanation:
Favorable outcomes: (3,6),(4,5),(5,4),(6,3) → 4. Probability = 4/36 = 1/9.
Favorable outcomes: (3,6),(4,5),(5,4),(6,3) → 4. Probability = 4/36 = 1/9.
This question belongs to:
Accountancy and Statistics
Statistics
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