In the theory of attributes, the total number of objects N is equal to: MCQ with Answer and Explanation

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In the theory of attributes, the total number of objects N is equal to:

A. Both A and B

B. (A)+(α)

C. (AB)+(Aβ)+(αB)+(αβ)

D. (A)+(B)-(AB)

Answer: Option A

Solution (By JKSSB Mock Tests)

Both identities hold; (A)+(α)=N, and the sum of ultimate class frequencies also equals N.

This question belongs to: Accountancy and Statistics Statistics

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Practice More Statistics Questions

Question #1

If the price index rises from 100 to 120, the purchasing power of money:

A. Remains unchanged

B. Increases by 20%

C. Decreases by 20%

D. Decreases by 16.67%

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Correct Answer: Option D

Explanation:
Purchasing power = 1/price index. Old: 1/100=0.01, new: 1/120≈0.00833, decline = (0.01-0.00833)/0.01 = 0.1667 or 16.67%.

This question belongs to: Accountancy and Statistics Statistics

Question #2

Combined mean formula is essential when:

A. Merging means from groups of different sizes

B. All groups have the same size

C. Calculating mode

D. Data is qualitative

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Correct Answer: Option A

Explanation:
Combined mean = (n₁x̄₁ + n₂x̄₂) / (n₁ + n₂) weights each group's mean by its size, providing the correct overall mean when aggregating subgroup statistics.

This question belongs to: Accountancy and Statistics Statistics

Question #3

Which measure of central tendency is most appropriate for qualitative data (e.g., beauty, honesty)?

A. Median

B. Harmonic Mean

C. Geometric Mean

D. Arithmetic Mean

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Correct Answer: Option A

Explanation:
Median is a positional average and can be determined for ranked qualitative data.

This question belongs to: Accountancy and Statistics Statistics

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