PROC SURVEYSELECT provides a variety of methods ... from the sample to the survey population. Refer to Kish (1987, 1965), Kalton (1983), and Cochran (1977) for more information on probability sampling ...
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Random Sampling: Key to Reducing Bias and Increasing AccuracyStratified Random Sampling – If you suspect there ... determining the sample size, using a random selection method, avoiding selection bias, verifying independence, replicating the sampling ...
If you request a stratified sample design with a STRATA statement ... requests systematic selection with probability proportional to size. See the section "PPS Systematic Sampling" for details on this ...
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