The arithmetic mean of a set of values is 8. If each value is increased by 5, the new mean is: MCQ with Answer and Explanation
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Question #1
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Life expectancy at birth is best interpreted as:
Correct Answer: Option B
Explanation:
Life expectancy is a period measure derived from a life table, representing the mean survival time for a hypothetical cohort experiencing current age-specific death rates throughout life.
Life expectancy is a period measure derived from a life table, representing the mean survival time for a hypothetical cohort experiencing current age-specific death rates throughout life.
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Accountancy and Statistics
Statistics
Question #2
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Cost of Living Index (CLI) is conceptually synonymous with:
Correct Answer: Option D
Explanation:
CLI measures the changes in the cost of maintaining a certain standard of living, identical in purpose to the Consumer Price Index.
CLI measures the changes in the cost of maintaining a certain standard of living, identical in purpose to the Consumer Price Index.
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Accountancy and Statistics
Statistics
Question #3
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In a bolt factory, machines A(25%), B(35%), C(40%) produce bolts with defective rates 5%,4%,2%. A bolt is defective. Probability it came from C is:
Correct Answer: Option D
Explanation:
Bayes: P(C|D) = (0.4×0.02) / (0.25×0.05+0.35×0.04+0.4×0.02) = 0.008/0.0345 ≈ 0.2319.
Bayes: P(C|D) = (0.4×0.02) / (0.25×0.05+0.35×0.04+0.4×0.02) = 0.008/0.0345 ≈ 0.2319.
This question belongs to:
Accountancy and Statistics
Statistics
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