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从 2000 名学生中按不重复抽样方法抽去了 100 名进行调查，其中有女生 45名，则样本成数的抽样平均误差为（ ）。

单选题
2021-07-17 23:57
A、<span style="FONT-FAMILY: ; FONT-SIZE: 12pt" lang="EN-US">0.24</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ">％</span>
B、<span style="FONT-FAMILY: ; FONT-SIZE: 12pt" lang="EN-US">4.85</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ">％</span>
C、<span style="FONT-FAMILY: ; FONT-SIZE: 12pt" lang="EN-US">4.97</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ">％</span>
D、<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ">以上都不对</span>
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正确答案
B
试题解析
标签： 电子商务 高起专 数据库原理与应用 2020级第一学期期末考试
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