The notation (αβ) indicates items that: MCQ with Answer and Explanation

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The notation (αβ) indicates items that:

A. Possess both A and B

B. Possess A but not B

C. Possess B but not A

D. Possess neither A nor B

Answer: Option D

Solution (By JKSSB Mock Tests)

α is not A, β is not B, so (αβ) = items without A and without B.

This question belongs to: Accountancy and Statistics Statistics

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Practice More Statistics Questions

Question #1

Cost of Living Index is essentially a type of:

A. Producer Price Index

B. Consumer Price Index tailored to specific population groups

C. Export-Import Price Index

D. Wholesale Price Index

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Correct Answer: Option B

Explanation:
Cost of Living Index is a specialized CPI that reflects price changes for a consumption basket relevant to a particular demographic (e.g., industrial workers), used for wage adjustments and welfare analysis.

This question belongs to: Accountancy and Statistics Statistics

Question #2

A researcher is interested in the effect of a new drug. She selects 50 patients randomly from a hospital list. The list is the:

A. Sample

B. Sample unit

C. Population

D. Sampling frame

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Correct Answer: Option D

Explanation:
The hospital list is the sampling frame from which the sample is drawn.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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:

A. 0.23

B. 0.40

C. 0.02

D. 0.35

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Correct Answer: Option A

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.

This question belongs to: Accountancy and Statistics Statistics

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