A researcher assigns a unique number to each of 2000 factory workers and uses a computer-generated random number sequence to select 200 workers for a health survey. This sampling method is called:
- A Systematic sampling
- B Simple random sampling ✓
- C Stratified sampling
- D Cluster sampling
Correct answer: B. Simple random sampling
Explanation
Simple random sampling gives every individual in the population an equal and independent chance of selection, typically achieved using random number tables or computer-generated sequences. Systematic sampling selects every kth individual, stratified sampling divides the population into strata first, and cluster sampling selects groups rather than individuals.
Reference: Park's Textbook of Preventive and Social Medicine, 26th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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