在某护校学年近视率的调查中,该校共20个班,每班均有30人。采用以“班”为单位,使用随机数字表的方法随机抽取5个班,然后对抽到的5个班的所有学生进行调查。这样的抽样方法是 【 】
A.分层抽样
B.理论抽样
C.整群抽样
D.定额抽样
正确答案是C
扫描二维码免费使用微信小程序搜题/刷题/查看解析。
版权声明:本文由翰林刷题小程序授权发布,如需转载请注明出处。
本文链接:https://doc.20230611.cn/post/393425.html
上一篇:Choose the closest paraphrased version after each of the following sentence or the italicized part.But he perceived that his miracle had miscarried, and with that a great disgust of miracles came upon him.()
Choose the closest paraphrased version after each of the following sentence or the italicized part.
But he perceived that his miracle had miscarried, and with that a great disgust of miracles came upon him.()
下一篇:市场失灵情况下垄断的类型有哪些?