If the arithmetic mean of a sample is 20 and median is 22, the distribution is likely: MCQ with Answer and Explanation
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Question #1
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Which property of the arithmetic mean states that the sum of deviations from the mean is always zero?
Correct Answer: Option A
Explanation:
The sum of deviations of all observations from their arithmetic mean is always zero, i.e., Σ(x - x̄) = 0, which is a fundamental algebraic property of the mean.
The sum of deviations of all observations from their arithmetic mean is always zero, i.e., Σ(x - x̄) = 0, which is a fundamental algebraic property of the mean.
This question belongs to:
Accountancy and Statistics
Statistics
Question #2
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Which of the following is a disadvantage of the mailed questionnaire method for primary data collection?
Correct Answer: Option C
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 #3
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A frequency distribution that uses 'less than' or 'more than' type classes is called:
Correct Answer: Option C
Explanation:
Cumulative frequency distributions sum frequencies up to a point or from a point.
Cumulative frequency distributions sum frequencies up to a point or from a point.
This question belongs to:
Accountancy and Statistics
Statistics
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