If attributes A and B are independent, the expected frequency of (αβ) is: MCQ with Answer and Explanation

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If attributes A and B are independent, the expected frequency of (αβ) is:

A. Observed (αβ)

B. (α)×(β)/N²

C. (A)×(B)/N

D. (α)×(β)/N

Answer: Option D

Solution (By JKSSB Mock Tests)

Under independence, each cell frequency equals product of margins divided by N.

This question belongs to: Accountancy and Statistics Statistics

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Practice More Statistics Questions

Question #1

General Fertility Rate is a better measure of fertility than CBR because it:

A. Is simpler to compute

B. Includes males

C. Does not require birth data

D. Relates births to women of reproductive age

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Correct Answer: Option D

Explanation:
GFR restricts the denominator to the population at risk, i.e., women 15-49 years.

This question belongs to: Accountancy and Statistics Statistics

Question #2

Paasche's price index formula is:

A. Σp₁q₁ / Σp₀q₀ × 100

B. Σp₁(q₀+q₁) / Σp₀(q₀+q₁) × 100

C. Σp₁q₀ / Σp₀q₀ × 100

D. Σp₁q₁ / Σp₀q₁ × 100

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Correct Answer: Option D

Explanation:
Paasche index uses current period quantities: Σp₁q₁ / Σp₀q₁ × 100.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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

A. Class marks (midpoints)

B. Lower class limits

C. Cumulative frequencies

D. Upper class limits

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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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