Assuming that the population is normally distributed, the Confidence Intervals table gives confidence intervals for the mean, standard deviation, and variance at the confidence coefficient specified.

This article presents an analysis of the small-sample distribution of a class of approximate pivotal quantities for a normal coefficient of variation that contains the approximations of McKay, David, ...

For interval estimation of a proportion, coverage probabilities tend to be too large for "exact" confidence intervals based on inverting the binomial test and too small for the interval based on ...