Chrome，
QQ浏览器
-
-
-
播放：8 时间：2024-06-20简介： -
-
-
-
-
-
-
-
-
-
-
-
-
-
-
![[基础]高中数学必修第二册 9.2用样本估计总体（一）](//imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F2316c5b6c57ee9290c710041ba26699653e89f4a.jpg%40672w_378h_1c_%21web-search-common-cover)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
![9.2 用样本估计总体-9.2.4总体离散程度的估计-[9.2.4总体离散程度的估计].m3u8_h265](//imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F6837b411d4e87f6dc64f9af011fcf58f31599ec0.jpg%40672w_378h_1c_%21web-search-common-cover)
-
-
-
-
-
-
播放：24 时间：2024-06-19简介：
![[基础]高中数学必修第二册 9.2用样本估计总体（一）](http://imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F2316c5b6c57ee9290c710041ba26699653e89f4a.jpg%40672w_378h_1c_%21web-search-common-cover)
![9.2 用样本估计总体-9.2.4总体离散程度的估计-[9.2.4总体离散程度的估计].m3u8_h265](http://imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F6837b411d4e87f6dc64f9af011fcf58f31599ec0.jpg%40672w_378h_1c_%21web-search-common-cover)
.