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
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. Complete association
C. Independent
D. Consistent
Answer: Option D
Solution (By JKSSB Mock Tests)
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
General Fertility Rate (GFR) is higher than Crude Birth Rate (CBR) when:
A. Infant mortality is high
B. The proportion of women aged 15-49 is high
C. The proportion of women aged 15-49 is low
D. Life expectancy is low
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Correct Answer: Option C

Explanation:
GFR denominator is only women 15-49, while CBR uses total population. If this group is a small share of total population (e.g., aging society), GFR > CBR because the same births are divided by a smaller denominator.
This question belongs to: Accountancy and Statistics Statistics
Question #2
A card is drawn from a well-shuffled deck of 52 cards. The probability that it is a jack or a spade is:
A. 16/52
B. 1/4
C. 17/52
D. 4/13
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Correct Answer: Option A

Explanation:
P(jack)=4/52, spade=13/52, jack of spades=1/52. P=4/52+13/52-1/52=16/52.
This question belongs to: Accountancy and Statistics Statistics
Question #3
A good questionnaire should have:
A. Questions arranged in random order
B. Many open-ended questions to confuse
C. Double negatives for clarity
D. Simple and clear language
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Correct Answer: Option D

Explanation:
Clarity and simplicity are fundamental principles.
This question belongs to: Accountancy and Statistics Statistics
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