Department of StatisticsRamanujan School of Mathematical sciences Pondicherry University Puducherry, 605014, India;
Department of StatisticsRamanujan School of Mathematical sciences Pondicherry University Puducherry, 605014, India;
无偏估计 辅助变量 改性 产品 估计量 总体均值 均方误差 自然种群;