@article { author = {SALEHI, M. and LEVY, P. S. and RAO, J.}, title = {TWO-PHASE SAMPLE SIZE ESTIMATION WITH PRE-ASSIGNED VARIANCE UNDER NORMALITY ASSUMPTION}, journal = {Iranian Journal of Science}, volume = {34}, number = {4}, pages = {349-353}, year = {2010}, publisher = {Springer}, issn = {2731-8095}, eissn = {2731-8109}, doi = {10.22099/ijsts.2010.2185}, abstract = {We develop a two phase sampling procedure to determine the sample size necessary to estimatethe 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.}, keywords = {Population mean,sample size determination,two phase sampling}, url = {https://ijsts.shirazu.ac.ir/article_2185.html}, eprint = {https://ijsts.shirazu.ac.ir/article_2185_a045a2ddcb34f2ca54fb1b94b03a2d26.pdf} }