In demography, 'dependency ratio' is calculated as: MCQ with Answer and Explanation

In demography, 'dependency ratio' is calculated as:
A. Literates / Illiterates × 100
B. Births / Deaths × 100
C. (Population aged 0-14 + 65+) / Population aged 15-64 × 100
D. Urban population / Rural population × 100
Answer: Option C
Solution (By JKSSB Mock Tests)
Dependency ratio = (Young dependents + Old dependents) / Working-age population × 100, indicating the economic burden on the productive population to support non-working groups.

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Pre-testing of a questionnaire refers to:
A. Trying out the questionnaire on a small group to identify problems
B. Printing the questionnaire
C. Administering the questionnaire to the actual sample
D. Analyzing pilot data

Correct Answer: Option A


Explanation:
Pre-test (pilot study) helps detect ambiguous questions and practical difficulties before the main survey.

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Question #2
The sum of squares of deviations from the mean is:
A. Minimum
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Correct Answer: Option A


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The sum of squared deviations from the mean is minimum; from any other point it would be larger.

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Vital statistics are related to:
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Correct Answer: Option A


Explanation:
Vital statistics pertain to the recording of vital events like births, deaths, marriages, etc.

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