设<img src="https://static.zxtiku.com/wangke/imgs/topic/b29661499a8f8f6c51d9c4f25991c019.jpg"/>是来自<img src="https://static.zxtiku.com/wangke/imgs/topic/4d92f897d3997b7bd762963938322f66.jpg"/>的一个样本，<img src="https://static.zxtiku.com/wangke/imgs/topic/28744e81f4caacc0cadbf433e2b3f2c3.jpg"/>和<img src="https://static.zxtiku.com/wangke/imgs/topic/aa8389c6ee2dbe8105df1cf807727a7f.jpg"/>分别为样本均值和样本方差，则下列结论不成立的有（）.