Central Limit Theorem: A sampling distribution of the mean is approximately normally distributed if the sample size is sufficiently large. This is true no matter what the population distribution is.

Deterministic Sampling for Propagating Model Covariance. SIAM/ASA Journal on Uncertainty Quantification, 1(1), 297–318. DOI: 10.1137/120899133. 注意書き（Disclaimer） 本記事は上記論文の内容を ChatGPT ...

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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 ...