Total Fertility Rate (TFR) of 1.8 in a developed country suggests:
A. Migration is the only growth source
B. Fertility is increasing
C. Population is below replacement level
D. Population will grow rapidly
Answer: Option C
Solution (By JKSSB Mock Tests)
Replacement-level TFR is ~2.1 in low-mortality settings; TFR=1.8 indicates each generation of women has fewer daughters than needed for replacement, leading to eventual population decline without immigration.
Explanation:
Maternal deaths are relatively rare; using a base of 100,000 live births yields manageable numbers (e.g., 100-500) instead of tiny decimals (0.001-0.005), enhancing readability and comparison.
Explanation:
Using standard notation, α denotes absence of attribute A, β denotes absence of attribute B; thus (αβ) is the count of units lacking both attributes.
Explanation:
Pre-testing a questionnaire with a small pilot group helps detect unclear wording, logical flaws, or response issues, ensuring the instrument is valid and reliable for the main survey.
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