Consider the following statements about primary data: 1. It is collected directly by the investigator. 2. It is always more reliable than secondary data. 3. It is economical in terms of time and cost. Which of the statements is/are correct? MCQ with Answer and Explanation
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Question #1
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The average wage of 10 male workers is Rs. 500, and of 10 female workers is Rs. 400. What is the combined mean wage?
Correct Answer: Option A
Explanation:
Combined mean = (n1*x1 + n2*x2) / (n1+n2) = (5000 + 4000) / 20 = 450.
Combined mean = (n1*x1 + n2*x2) / (n1+n2) = (5000 + 4000) / 20 = 450.
This question belongs to:
Accountancy and Statistics
Statistics
Question #2
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The 'life expectancy at birth' in India as per recent SRS is about:
Correct Answer: Option D
Explanation:
Life expectancy at birth is around 69 years (2014-18).
Life expectancy at birth is around 69 years (2014-18).
This question belongs to:
Accountancy and Statistics
Statistics
Question #3
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Vital statistics from civil registration are superior to survey estimates for:
Correct Answer: Option D
Explanation:
Well-functioning civil registration provides continuous, complete, and timely data, enabling accurate trend analysis, real-time monitoring, and small-area estimates, unlike periodic surveys with sampling error and recall bias.
Well-functioning civil registration provides continuous, complete, and timely data, enabling accurate trend analysis, real-time monitoring, and small-area estimates, unlike periodic surveys with sampling error and recall bias.
This question belongs to:
Accountancy and Statistics
Statistics
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