Which sampling method is MOST appropriate for collecting primary data from a heterogeneous population with distinct subgroups? MCQ with Answer and Explanation
Which sampling method is MOST appropriate for collecting primary data from a heterogeneous population with distinct subgroups?
A. Stratified random sampling
B. Simple random sampling
C. Convenience sampling
D. Snowball sampling
Answer: Option A
Solution (By JKSSB Mock Tests)
Stratified sampling divides the population into homogeneous subgroups (strata) and samples from each, ensuring representation of all key segments and improving precision for subgroup analysis.
The population of a country in 2020 was 100 million with a growth rate of 2% per year. Assuming exponential growth, the population in 2022 is approximately:
Explanation:
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.
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