In attributes, if (AB)=30, (A)=40, (B)=50, N=100, the expected frequency under independence is: MCQ with Answer and Explanation

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In attributes, if (AB)=30, (A)=40, (B)=50, N=100, the expected frequency under independence is:

A. 30

B. 25

C. 15

D. 20

Answer: Option D

Solution (By JKSSB Mock Tests)

Expected (AB) = (40×50)/100 = 20.

This question belongs to: Accountancy and Statistics Statistics

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The Sample Registration System (SRS) in India provides:

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B. Census results

C. Migration data

D. Reliable estimates of fertility and mortality at state and national levels

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Correct Answer: Option D

Explanation:
SRS is a large-scale sample survey providing annual estimates of birth and death rates.

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The CPI for agricultural labourers (CPI-AL) is used to:

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Correct Answer: Option C

Explanation:
CPI-AL is primarily used to revise minimum wages for agricultural workers.

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When constructing a frequency polygon, the frequencies are plotted against:

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Correct Answer: Option A

Explanation:
A frequency polygon connects the points formed by the class frequencies plotted at the exact midpoints of the class intervals.

This question belongs to: Accountancy and Statistics Statistics

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