A box contains 4 white and 6 black balls. A ball is drawn and not replaced. Then another ball is drawn. The probability that both are white is: MCQ with Answer and Explanation
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Question #1
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Which of the following is a disadvantage of the mailed questionnaire method for primary data collection?
Correct Answer: Option B
Explanation:
Mailed questionnaires often suffer from low return rates, and respondents who reply may differ systematically from non-respondents, introducing bias that is difficult to assess or correct.
Mailed questionnaires often suffer from low return rates, and respondents who reply may differ systematically from non-respondents, introducing bias that is difficult to assess or correct.
This question belongs to:
Accountancy and Statistics
Statistics
Question #2
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If P(A) = 0.5, P(B) = 0.3, and P(A∪B) = 0.7, then P(A|B) equals:
Correct Answer: Option B
Explanation:
P(A∩B)=0.5+0.3-0.7=0.1. P(A|B)=0.1/0.3≈0.333.
P(A∩B)=0.5+0.3-0.7=0.1. P(A|B)=0.1/0.3≈0.333.
This question belongs to:
Accountancy and Statistics
Statistics
Question #3
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In the context of primary data collection, which of the following statements is/are true? 1. Schedule is filled by the enumerator. 2. Questionnaire is self-administered. 3. Schedule requires literate respondents. Select the correct answer:
Correct Answer: Option B
Explanation:
Schedule is filled by enumerator, so respondents need not be literate; questionnaire is filled by the respondent. Statement 3 is false because schedule does not require literate respondents.
Schedule is filled by enumerator, so respondents need not be literate; questionnaire is filled by the respondent. Statement 3 is false because schedule does not require literate respondents.
This question belongs to:
Accountancy and Statistics
Statistics
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