首页/ 题库 / [单选题]实验组和对照组必须均衡,唯一不同的是()的答案

实验组和对照组必须均衡,唯一不同的是()。

单选题
2021-12-27 18:04
A、观察指标
B、观察时间
C、实验因素
D、抽样误差
E、系统误差
查看答案

正确答案
C

试题解析
实验组和对照组必须均衡,是指实验组和对照组除实验因素外其他所有因素或条件要一致。所以设立的对照组和实验组唯一不同的是实验因素。

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