The data collected from a sample is: MCQ with Answer and Explanation
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Question #1
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TFR of 2.1 children per woman is called replacement-level fertility because it:
Correct Answer: Option D
Explanation:
TFR of about 2.1 ensures each generation exactly replaces itself (assuming low mortality), leading to eventual zero growth.
TFR of about 2.1 ensures each generation exactly replaces itself (assuming low mortality), leading to eventual zero growth.
This question belongs to:
Accountancy and Statistics
Statistics
Question #2
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The combined mean of two groups with means 40 (size 10) and 60 (size 20) is:
Correct Answer: Option A
Explanation:
Combined mean = (10×40 + 20×60) / (10+20) = (400 + 1200) / 30 = 1600 / 30 ≈ 53.33. This weights each group's mean by its sample size.
Combined mean = (10×40 + 20×60) / (10+20) = (400 + 1200) / 30 = 1600 / 30 ≈ 53.33. This weights each group's mean by its sample size.
This question belongs to:
Accountancy and Statistics
Statistics
Question #3
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In a frequency distribution, the cumulative frequency of the last class is equal to:
Correct Answer: Option D
Explanation:
Cumulative frequency accumulates all frequencies; the last cumulative frequency equals total frequency.
Cumulative frequency accumulates all frequencies; the last cumulative frequency equals total frequency.
This question belongs to:
Accountancy and Statistics
Statistics
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