Author/Authors :
SALEHI، M نويسنده Department of Mathematics, Statistics and Physics, Qatar University, Doha, Qatar , , LEVY، P. S. نويسنده RTI International, Research Triangle Park, North Carolina, USA , , RAO، J نويسنده School of Mathematics and Statistics, Carleton University, Ottawa, Canada ,
Abstract :
We develop a two phase sampling procedure to determine the sample size necessary to estimate
the population mean of a normally distributed random variable and show that the resulting estimator has preassigned
variance and is unbiased under a regular condition. We present a necessary and sufficient condition
under which the final sample mean is an unbiased estimator for the population mean.
