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.

When Wald-Wolfowitz's approximate method of computing tolerance intervals is applied to two-stage sampling from a normal population further approximations have to be introduced. Their effect on the ...

Complex sample designs, involving stratified and/or multistage sampling with sample weighting, along with frequency matching, are used to select controls or cases for case–control studies. Examples ...

Objective: To estimate the habitual dietary intake distribution in a population on the basis of repeated short-term measurements, especially of multiple 24 h diet recalls. Methods: Six different ...