理论上，样本方差=与总体方差，样本标准差＜总体标准差

{"ops":[{"attributes":{"class":"normal-img"},"insert":{"native-image":{"alt":"read-normal-img","url":"https://b1.sanwen.net/b_article/watermark/d15cb45cda2d33168b4f2ccb2aa02b52b357f2f8.jpg","width":2319,"height":2849,"size":3938015,"status":"loaded"}}},{"insert":"\n"},{"attributes":{"class":"normal-img"},"insert":{"native-image":{"alt":"read-normal-img","url":"https://b1.sanwen.net/b_article/watermark/2bf7e62966e5b9a96d75e7dada72ba6445b3f981.jpg","width":2355,"height":3461,"size":4981111,"status":"loaded"}}},{"insert":"\n"},{"attributes":{"class":"normal-img"},"insert":{"native-image":{"alt":"read-normal-img","url":"https://b1.sanwen.net/b_article/watermark/9bfd508c682493d0a240bf0432c59c129a566613.jpg","width":1221,"height":1548,"size":1275430,"status":"loaded"}}},{"insert":"\n"},{"attributes":{"class":"normal-img"},"insert":{"native-image":{"alt":"read-normal-img","url":"https://b1.sanwen.net/b_article/watermark/bc0a756d3d32d177a69a3fd21cc145c958b12362.jpg","width":2402,"height":3947,"size":5875514,"status":"loaded"}}},{"insert":"\n但，对于"},{"attributes":{"bold":true},"insert":"样本标准差"},{"insert":"，我在Excel中做蒙特卡罗模拟，当总体为"},{"attributes":{"color":"#f85a54","bold":true},"insert":"正态"},{"insert":"分布总体或"},{"attributes":{"color":"#f85a54","bold":true},"insert":"均匀"},{"insert":"分布总体且"},{"attributes":{"color":"#f85a54","bold":true},"insert":"样本量较大"},{"insert":"时，样本标准差趋近于总体标准差（正态的是从左侧趋近，均匀的是趋近）。\n\n以上个人理解，如有不当之处，请批评指正。\n"}]}