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	आनुपातिक सरल यादृच्छिक नमूनाकरण (Proportional Simple Random Sampling)	आनुपातिक स्तरीकृत नमूनाकरण
क्षेत्र	सर्वेक्षण पद्धति	सर्वेक्षण पद्धति
परिवार	Process / pipeline	Process / pipeline
उद्भव वर्ष	Mid-20th century (formalized ~1950s–1970s)	1953–1965 (formalized in survey sampling literature)
प्रवर्तक	William G. Cochran and survey statisticians (classical probability sampling tradition)	William G. Cochran; Leslie Kish
प्रकार	Probability sampling technique	Probability sampling design
मौलिक स्रोत	Cochran, W. G. (1977). Sampling Techniques (3rd ed.). John Wiley & Sons. ISBN: 978-0471162407	Cochran, W. G. (1977). Sampling Techniques (3rd ed.). John Wiley & Sons. ISBN: 978-0471162407
उपनाम	proportional SRS, probability-proportional simple random sampling, proportional random sampling	proportionate stratified sampling, proportional allocation stratified sampling, PSRS, proportionate stratified random sampling
संबंधित	6	6
सारांश	Proportional simple random sampling is a probability-based sampling technique in which units are drawn at random from each subgroup of the population in numbers proportional to each subgroup's share of the total population. This ensures the resulting sample mirrors the population's composition across key subgroups, while retaining the randomness and unbiasedness of simple random sampling within each group.	Proportional stratified sampling divides the target population into non-overlapping strata (subgroups defined by a key characteristic such as age band, region, or gender) and then draws a simple random sample from each stratum so that each stratum's share of the total sample matches its share of the total population. Because each subgroup is represented in exact proportion to its population weight, the resulting sample mirrors the population structure closely without requiring post-hoc weighting adjustments.