Nonnegative Unbiased Estimation of Variance for Systematic Sampling with Supplementary Observations
Zou Guohua1, Feng Shiyong2
1 Department of Mathematics, Beijing Normal University, Beijing 100875; 2 Institute of Systems Science, the Chinese Academy of Sciences, Beijing 100080
Zou Guohua, Feng Shiyong. Nonnegative Unbiased Estimation of Variance for Systematic Sampling with Supplementary Observations[J].Acta mathematica scientia,Series A, 1997, 17(3): 301-307.