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三个样本率分别为82.9%,84.0%,53.9%,评价其高低的方法是()。

单选题
2022-04-26 21:06
A、直接比较三个样本率
B、用标准化率的大小评价
C、进行率的标准化处理
D、对三个率作χ检验
E、对三个率作相关分析
查看答案

正确答案
D

试题解析
三个样本率直接比较,忽略了抽样误差的影响;用标准化方法计算标准化率是针对总体率进行的比较,不能用于样本率比较;相关分析不作率间的比较;所以对三个样本率要作行×列的χ检验。

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