The combined mean of two groups depends on: MCQ with Answer and Explanation
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Question #1
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Which measure of central tendency can be used for both quantitative and qualitative (nominal) data?
Correct Answer: Option C
Explanation:
The mode identifies the most frequent category and can be applied to nominal qualitative data (e.g., favorite color), whereas mean and median require at least ordinal or numerical data.
The mode identifies the most frequent category and can be applied to nominal qualitative data (e.g., favorite color), whereas mean and median require at least ordinal or numerical data.
This question belongs to:
Accountancy and Statistics
Statistics
Question #2
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Data on attributes is said to be consistent if:
Correct Answer: Option A
Explanation:
Consistency requires that all derived class frequencies (including ultimate classes) are non-negative, as negative counts are logically impossible in real-world data.
Consistency requires that all derived class frequencies (including ultimate classes) are non-negative, as negative counts are logically impossible in real-world data.
This question belongs to:
Accountancy and Statistics
Statistics
Question #3
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There are two urns: Urn 1 contains 4 white, 6 black; Urn 2 contains 5 white, 5 black. An urn is chosen at random and a ball drawn. If it is white, probability it came from Urn 1 is:
Correct Answer: Option B
Explanation:
P(Urn1|W) = (1/2 * 4/10) / (1/2*4/10 + 1/2*5/10) = 0.2 / (0.2+0.25)=0.2/0.45=4/9.
P(Urn1|W) = (1/2 * 4/10) / (1/2*4/10 + 1/2*5/10) = 0.2 / (0.2+0.25)=0.2/0.45=4/9.
This question belongs to:
Accountancy and Statistics
Statistics
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