If the number of observations possessing A is 70, B is 60, and AB is 50, then the number possessing neither is 20. The data are: MCQ with Answer and Explanation

Question Report Error

If the number of observations possessing A is 70, B is 60, and AB is 50, then the number possessing neither is 20. The data are:

A. Inconsistent

B. Consistent

C. Complete association

D. Independent

Answer: Option B

Solution (By JKExamLibrary)

Check all ultimate classes: (AB)=50, (Aβ)=70-50=20, (αB)=60-50=10, (αβ)=20. Sum=50+20+10+20=100, all non-negative. Consistent.

This question belongs to: Accountancy and Statistics Statistics

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Practice More Statistics Questions

Question #1 Report Error

Population growth rate is calculated as:

A. Crude Birth Rate - Crude Death Rate

B. (Births - Deaths) / Mid-year population × 100

C. (Births + Immigration - Deaths - Emigration) / Mid-year population × 100

D. Both B and C are correct

View Answer & Solution Discuss

Correct Answer: Option D

Explanation:
Natural growth rate = CBR - CDR (per 1,000); overall growth rate includes net migration. Both formulations are used, with B being comprehensive and C focusing on natural increase.

This question belongs to: Accountancy and Statistics Statistics

Question #2 Report Error

Crude Birth Rate is expressed per 1,000 population to:

A. Match international standards

B. Align with death rate calculation

C. Convert the rate to a convenient whole number scale

D. Simplify arithmetic

View Answer & Solution Discuss

Correct Answer: Option C

Explanation:
Using a base of 1,000 transforms small proportions (e.g., 0.02) into whole numbers (20), enhancing readability and comparability across populations without altering the underlying rate.

This question belongs to: Accountancy and Statistics Statistics