A、B、C三位同学需要对一袋小麦种子进行发芽率测定,他们运用抽样

ABC三位同学需要对一袋小麦种子进行发芽率测定,他们运用抽样检测的方法同时做了测定小麦发芽率的实验。A同学为了避免浪费,取了五粒小麦种子进行发芽率测定,B同学挑出个大饱满的种子进行发芽率测定,C同学随意抽取袋中的100粒种子进行发芽率的测定。从三位同学取样的方法来看:

1___________同学所测定的发芽率的结果最接近总体的真实情况。

2___________同学和___________同学所测定的结果准确性欠佳,其原因是前者抽样时样本的数量 ___________,后者抽样时受到了___________的影响。

答案

1C

2A  B 过少   主观因素

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