【摘要】 对简单随机抽样两种定义的关系进行了讨论,澄清了教科书中的一些模糊不清之处;通过反例举证了两种定义在某种意义下的不等价性;给出了变概率抽样与不等概率抽样的定义,指出变概率抽样与不等概率抽样也可以是简单随机抽样;本文最后,给出了简单随机抽样的更具一般性的(广义)定义.更多还原

【Abstract】 Some confusions areclarified on the relations between the two definitions of simple random sampling; their non equivalence in some senses is given by examples. The definitions of varying-probability sampling and unequal probability sampling are proposed, pointing out that varying-probability sampling and unequal probability sampling can be as a simple random sampling; a more general definition ofsimple random sampling is given in the end.更多还原