In attribute theory, the class frequency (Aβ) indicates objects possessing: MCQ with Answer and Explanation

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In attribute theory, the class frequency (Aβ) indicates objects possessing:

A. A but not B

B. Both A and B

C. B but not A

D. Neither A nor B

Answer: Option A

Solution (By JKExamLibrary)

β denotes absence of B, so (Aβ) = possessing A and not B.

This question belongs to: Accountancy and Statistics Statistics

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Question #1 Report Error

Given P(A)=0.5, P(B)=0.3, P(A∩B)=0.1. Are A and B independent?

A. Yes, because P(A∩B)=P(A)P(B)

B. No, because 0.1 ≠ 0.15

C. Yes, because they are mutually exclusive

D. Cannot determine

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Correct Answer: Option B

Explanation:
P(A)P(B)=0.5×0.3=0.15 ≠ 0.1, so not independent.

This question belongs to: Accountancy and Statistics Statistics

Question #2 Report Error

The weighted harmonic mean is used in which of the following situations?

A. Finding the typical value of a symmetric distribution

B. Averaging rates when weights are in the denominator units

C. Measuring dispersion

D. Averaging percentages

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Correct Answer: Option B

Explanation:
Weighted harmonic mean is useful when the weights are in the same units as the numerator of a rate.

This question belongs to: Accountancy and Statistics Statistics

Question #3 Report Error

In a frequency distribution, if the mean is 50, median is 48, and mode is 45, the distribution is likely:

A. Negatively skewed

B. Symmetrical

C. Bimodal

D. Positively skewed

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Correct Answer: Option D

Explanation:
In a positively skewed distribution, mean > median > mode due to the pull of extreme high values; here, 50 > 48 > 45 aligns with this pattern, indicating right-skewness.

This question belongs to: Accountancy and Statistics Statistics

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