विधियों की तुलना करें

	डबल सैंपलिंग	अनुक्रमिक विश्लेषण (समूह अनुक्रमिक डिज़ाइन)
क्षेत्र	प्रतिचयन	सांख्यिकी
परिवार	Process / pipeline	Hypothesis test
उद्भव वर्ष	1938	1977
प्रवर्तक	Jerzy Neyman	P. C. O'Brien & T. R. Fleming; P. C. Pocock
प्रकार	Multi-phase sampling design	Sequential / adaptive hypothesis test
मौलिक स्रोत	Neyman, J. (1938). Contribution to the theory of sampling human populations. Journal of the American Statistical Association, 33(201), 101–116.	O'Brien, P.C. & Fleming, T.R. (1979). A Multiple Testing Procedure for Clinical Trials. Biometrics, 35(3), 549–556.
उपनाम	Two-Phase Sampling	sequential testing, group sequential design, interim analysis, Sıralı Analiz (Sequential Testing / Group Sequential Design)
संबंधित	4	5
सारांश	Double Sampling (also called two-phase or multistage sampling) is a survey design in which a large preliminary sample is collected using inexpensive methods or partial information, then a smaller subsample is drawn from it and measured in detail. Pioneered by Jerzy Neyman in 1938, it is particularly useful when a cheap surrogate measurement is available but true measurement is expensive.	Sequential analysis is a framework for conducting hypothesis tests with pre-planned interim looks at accumulating data, allowing a study to stop early for efficacy or futility while controlling the overall Type I error rate. The group sequential approach was formalised by Pocock (1977) and O'Brien and Fleming (1979), and remains the standard for confirmatory clinical trials and rigorous A/B experiments.