Question
Download Solution PDFWhich of the following samples is not a probability sample design ?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is - Quota sample
Key Points
- Quota sample
- A Quota sample is a type of non-probability sampling method where the researcher selects participants based on specific characteristics or quotas.
- Unlike probability sampling, quota sampling does not rely on random selection, which means not every individual has an equal chance of being chosen.
- This method can lead to selection bias, making it less suitable for studies requiring statistical representativeness.
- Quota sampling is often used in market research or surveys where time and cost constraints are significant.
Additional Information
- Probability sampling methods
- Stratified sampling: Divides the population into subgroups (strata) and randomly selects samples from each subgroup. This ensures representation across different categories.
- Cluster sampling: Groups the population into clusters, then randomly selects entire clusters for study. Useful for large, geographically dispersed populations.
- Systematic random sampling: Selects samples using a fixed interval (e.g., every 5th individual). The starting point is chosen randomly, ensuring randomness in selection.
- Key difference between probability and non-probability sampling
- Probability sampling: Ensures that every individual has an equal chance of being selected, making the sample statistically representative of the population.
- Non-probability sampling: Relies on subjective methods, such as convenience or judgment, leading to potential bias and lack of representativeness.
Last updated on Jun 26, 2025
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