เปรียบเทียบวิธี

	การสุ่มตัวอย่างเชิงระบบแบบถ่วงน้ำหนัก	การสุ่มตัวอย่างแบบง่าย (Simple Random Sampling
สาขาวิชา	ระเบียบวิธีสำรวจ	ระเบียบวิธีสำรวจ
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	Mid-20th century (1950s-1970s)	Early 20th century; systematized by Cochran 1953/1977
ผู้ริเริ่ม	William G. Cochran (systematic and weighted probability sampling theory)	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.). Wiley. ISBN: 978-0471162407	Cochran, W. G. (1977). Sampling Techniques (3rd ed.). John Wiley & Sons. ISBN: 978-0471162407
ชื่อเรียกอื่น	systematic sampling with weights, probability-weighted systematic sampling, systematic PPS sampling	SRS, unrestricted random sampling, equal-probability sampling, EPSEM
ที่เกี่ยวข้อง	5	6
สรุป	Weighted systematic sampling selects units at equal spacing along a cumulative-weight axis rather than along a simple list index. By ordering the population and accumulating auxiliary size or importance weights before applying a fixed sampling interval, it combines the operational simplicity of systematic sampling with the efficiency gains of probability-proportional-to-size selection — giving larger or more important units a higher probability of inclusion while still visiting every part of the ordered frame.	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.