Systematic Random Sampling The method of systematic random sampling (METHOD=SYS) selects units at a fixed interval throughout the sampling frame or stratum after a random start. PROC SURVEYSELECT ...

Systematic and random sampling Systematic sampling means testing a hypothesis by taking several equally spaced items from a larger list, eg selecting the tenth, 20th and 30th visitor to a theme park.

Many concepts in sociology are difficult or impossible to objectively measure. This limitation forces a reliance on subjective measures that typically contain both systematic and random measurement ...

W. G. Cochran, Relative Accuracy of Systematic and Stratified Random Samples for a Certain Class of Populations, The Annals of Mathematical Statistics, Vol. 17, No. 2 (Jun., 1946), pp. 164-177 ...