If N = 100, (A) = 60, (B) = 50, what is the condition for attributes A and B to be independent? MCQ with Answer and Explanation

If N = 100, (A) = 60, (B) = 50, what is the condition for attributes A and B to be independent?

A. (AB) = 10

B. (AB) = 110

C. (AB) = 0

D. (AB) = 30

Answer: Option D

Two attributes are independent if (AB) = (A) × (B) / N. Here, (60 × 50) / 100 = 30.

This question belongs to: Accountancy and Statistics Statistics

No comments yet. Be the first to start the discussion!

Question #1 Report Error

A bag contains 3 red, 5 black balls. Two balls are drawn at random. The probability that they are of different colors is:

A. 15/56

B. 15/28

C. 1/2

D. 3/8

Correct Answer: Option B

Explanation:
Total ways C(8,2)=28. 1 red 1 black = 3×5=15. Probability=15/28.

This question belongs to: Accountancy and Statistics Statistics

Question #2 Report Error

Which method of collecting primary data is most suitable when the field of investigation is highly confidential and restricted?

A. Indirect oral investigation

B. Information through local correspondents

C. Mailed questionnaire method

D. Direct personal interview

Correct Answer: Option D

Explanation:
Direct personal interview ensures maximum confidentiality as the investigator directly collects data without intermediaries.

This question belongs to: Accountancy and Statistics Statistics

Question #3 Report Error

The sex ratio in India is defined as:

A. Females per 1000 males

B. Males per 1000 females

C. Females per 1000 population

D. Males per 1000 population

Correct Answer: Option A

Explanation:
Sex ratio = (number of females / number of males) × 1000.

This question belongs to: Accountancy and Statistics Statistics