The CPI for agricultural labourers (CPI-AL) is compiled by: MCQ with Answer and Explanation

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The CPI for agricultural labourers (CPI-AL) is compiled by:

A. RBI

B. Labour Bureau

C. NITI Aayog

D. NSO

Answer: Option B

Solution (By JKSSB Mock Tests)

Labour Bureau compiles CPI-AL.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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In a 2×2 attribute table, if (A)=400, (B)=500, N=1000, and observed (AB)=250, the expected (AB) under independence is:

A. 400

B. 250

C. 300

D. 200

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Correct Answer: Option D

Explanation:
Expected (AB) = (A)×(B)/N = 400×500/1000 = 200,000/1000 = 200. Observed 250 > 200 suggests positive association between attributes A and B.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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Which of the following pairs of events are independent?

A. Selecting a student from a class: A = student is male, B = student plays on the football team (all footballers are male).

B. Tossing a fair coin twice: A = first toss is head, B = second toss is tail.

C. Rolling a die twice: A = first roll is 5, B = sum is 10.

D. Drawing two cards without replacement from a deck: A = first is an ace, B = second is an ace.

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Correct Answer: Option B

Explanation:
Coin tosses are independent. In A, without replacement, not independent. In B, outcome of first affects probability of sum. In D, P(B|A) >0 but P(B|A')=0, so not independent.

This question belongs to: Accountancy and Statistics Statistics