Returns the confidence interval for a population mean. See Help for the equation used
The calculation formulas of sample size based on the error limitation are given for estimation of population mean.
The most stringent somewhere most powerful one sided test of the asymptotic multivariate normal population mean--The application of the ranked set sample;
We give the approximation formulas of the variance of the sample ratio estimator for a population mean and its asymptotically non-biased estimator in multi-stage sampling.
