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 chooses the first unit randomly ...
If you specify the option METHOD=PPS_SYS, PROC SURVEYSELECT selects units by systematic random sampling with probability proportional to size. Systematic sampling selects units at a fixed interval ...
The Canadian Journal of Statistics / La Revue Canadienne de Statistique Using Fourier series expansions of functions of one and two variables, we find the variances of the sample mean for random and ...
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