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.

This is a preview. Log in through your library . Abstract The distribution of the sample correlation coefficient is derived when the population is a mixture of two bivariate normal distributions with ...

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 ...