เปรียบเทียบวิธี

	การสุ่มตัวอย่างแบบสุ่มเชิงเดียวตามสัดส่วน	การสุ่มตัวอย่างแบบง่าย (Simple Random Sampling
สาขาวิชา	ระเบียบวิธีสำรวจ	ระเบียบวิธีสำรวจ
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	Mid-20th century (formalized ~1950s–1970s)	Early 20th century; systematized by Cochran 1953/1977
ผู้ริเริ่ม	William G. Cochran and survey statisticians (classical probability sampling tradition)	William Gosset, Jerzy Neyman, and formalized by William Cochran
ประเภท	Probability sampling technique	Probability sampling design
แหล่งต้นตำรับ	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
ชื่อเรียกอื่น	proportional SRS, probability-proportional simple random sampling, proportional random sampling	SRS, unrestricted random sampling, equal-probability sampling, EPSEM
ที่เกี่ยวข้อง	6	6
สรุป	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.	Simple random sampling (SRS) is the foundational probability sampling method in which every unit in the population has an equal and independent chance of being selected. Because selection is governed purely by chance, SRS eliminates systematic bias, supports unbiased estimation of population parameters, and provides the statistical baseline against which all more complex probability designs are evaluated.