设总体X服从正态分布<img src="https://static.zxtiku.com/wangke/imgs/topic/816d21f0bf296e049e87f6bcc954ba16.jpg"/>，<img src="https://static.zxtiku.com/wangke/imgs/topic/406d51db0147fc03ffe28eaa7f721682.jpg"/>为来自总体X的简单随机样本，记<img src="https://static.zxtiku.com/wangke/imgs/topic/3ee100e31205180ce14d833087fe93af.jpg"/> ，则<img src="https://static.zxtiku.com/wangke/imgs/topic/12d2b85bf02de0fc490981cb417f8410.jpg"/> 的值为<img src="https://static.zxtiku.com/wangke/imgs/topic/5e4b0877c497e2351c21b31e702d0c41.jpg"/>.<br /> A、正确<br /> B、错误