Leu and Tsui (1996) [8] developed the New Partially Systematic Sampling (NPSS) in order to derive an unbiased estimator of the variance of systematic sampling ( ) sy Vy.
Leu and Tsui (1996) [8] developed the New Partially Systematic Sampling (NPSS) in order to derive an unbiased estimator of the variance of systematic sampling ( ) syVy.