Σύγκριση μεθόδων

	Αναλογική Απλή Τυχαία Δειγματοληψία	Δειγματοληψία κατά στρωματοποιημένη αναλογία
Πεδίο	Μεθοδολογία Επισκοπήσεων	Μεθοδολογία Επισκοπήσεων
Οικογένεια	Process / pipeline	Process / pipeline
Έτος προέλευσης	Mid-20th century (formalized ~1950s–1970s)	1953–1965 (formalized in survey sampling literature)
Δημιουργός	William G. Cochran and survey statisticians (classical probability sampling tradition)	William G. Cochran; Leslie Kish
Τύπος	Probability sampling technique	Probability sampling design
Θεμελιώδης πηγή	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
Εναλλακτικές ονομασίες	proportional SRS, probability-proportional simple random sampling, proportional random sampling	proportionate stratified sampling, proportional allocation stratified sampling, PSRS, proportionate stratified random sampling
Συναφείς	6	6
Σύνοψη	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.