Judgment-Based Sampling Type
When an investigator selects samples from a population based on his own judgment or convenience, it is called:
- Random sampling
- Systematic sampling
- Non-random sampling — Correct Answer
- Stratified sampling
Explanation:
Correct Answer Explanation
When selection is based on the investigator's judgment, convenience, purpose or quota — rather than random chance — it is called Non-Random Sampling.
Key Features of Non-Random Sampling:
- All units do NOT have an equal chance of being selected.
- Introduces bias in the sample.
- Example: Selecting households that are conveniently situated or personally known to the researcher.
- Types: Judgment sampling, Purposive sampling, Convenience sampling, Quota sampling.
- Results are less reliable than random sampling for generalisation.
📚 About this Topic — CH-2: Collection of Data
This multiple choice question is from CH-2: Collection of Data, NCERT Books, Statistics for Economics. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from CH-2: Collection of Data to strengthen your preparation.
