Combined mean formula is essential when: MCQ with Answer and Explanation
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Question #1
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When designing a questionnaire, multiple-choice questions are preferred over open-ended questions primarily because:
Correct Answer: Option C
Explanation:
MCQs standardise responses, making data compilation, coding, and statistical tabulation much faster and uniform.
MCQs standardise responses, making data compilation, coding, and statistical tabulation much faster and uniform.
This question belongs to:
Accountancy and Statistics
Statistics
Question #2
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If the probability that a student passes Mathematics is 0.7, passes English is 0.6, and passes both is 0.4, what is the probability that the student passes at least one subject?
Correct Answer: Option B
Explanation:
P(Math ∪ English) = P(Math) + P(English) - P(both) = 0.7 + 0.6 - 0.4 = 0.9. This uses the addition theorem to avoid double-counting students who pass both.
P(Math ∪ English) = P(Math) + P(English) - P(both) = 0.7 + 0.6 - 0.4 = 0.9. This uses the addition theorem to avoid double-counting students who pass both.
This question belongs to:
Accountancy and Statistics
Statistics
Question #3
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The sum of frequencies of all classes in a distribution equals:
Correct Answer: Option C
Explanation:
Total frequency = N, the number of observations.
Total frequency = N, the number of observations.
This question belongs to:
Accountancy and Statistics
Statistics
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