【摘要】 根据统计抽样方法的设计原理,通过对各种抽样方法的比较研究,在充分考虑全国各区域粮食储藏量的差异与样本对总体代表性的基础上,结合我国农户储粮的实际情况,研究确定了一种优化组合的抽样方法,即:分层三阶段不等概率PPS系统抽样法及线性系统随机抽样法。更多还原

【Abstract】 According to the principle of statistical sampling methods,comparing and studying the kinds of sampling methods,considering the difference of grain storage quantity in each region and the sample representativeness of the total,integrating the actual situation of peasant storage a of optimized and constituted sampling method that stratify three stage not equal probability(PPS) system sampling and linear system random sampling was esteblished.更多还原