Compară metode
Examinează metodele selectate una lângă alta; rândurile care diferă sunt evidențiate.
| Eșantionare multistadială× | Eșantionare Stratificată× | |
|---|---|---|
| Domeniu | Metodologia anchetelor | Metodologia anchetelor |
| Familie | Process / pipeline | Process / pipeline |
| Anul apariției≠ | 1950s–1960s (formalized in Kish 1965 and Cochran 1977) | 1977 |
| Autorul original≠ | Leslie Kish; William G. Cochran | William G. Cochran |
| Tip≠ | Probability sampling design | Probability-based survey sampling design |
| Sursa seminală≠ | Kish, L. (1965). Survey Sampling. John Wiley & Sons. ISBN: 978-0471109495 | Cochran, W. G. (1977). Sampling Techniques (3rd ed.). Wiley. ISBN: 978-0-471-16240-7 |
| Denumiri alternative | multistage cluster sampling, multi-stage sampling, nested sampling, hierarchical sampling | Proportional Stratified Sampling, Optimal Allocation Sampling, Stratum-Based Sampling, Tabakalı Örnekleme |
| Înrudite≠ | 5 | 2 |
| Rezumat≠ | Multistage sampling is a probability-based design that selects a sample by working through two or more successive levels of a population hierarchy — for example, first selecting regions, then districts within those regions, then households within those districts. It makes large-scale surveys practical when a complete population list is unavailable or when the population is geographically dispersed, by concentrating fieldwork within a manageable number of sampled units at each stage. | Stratified sampling is a probability sampling design in which the target population is partitioned into non-overlapping, exhaustive subgroups called strata, and independent probability samples are drawn within each stratum. Formalized by William G. Cochran in Sampling Techniques (1977), the method exploits known population structure to reduce variance and guarantee representativeness of all major subgroups, making it a cornerstone of large-scale survey research and official statistics. |
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