A、n-1
B、n-2
C、n
更多“ 若<img src="https://nimg.ppkao.com/2017-07/jiangyouai/2017073016341619443.jpg?sign=54bba3971fc973a38113dffb34cf4038&t=62d0d171" />是来自正态总体<img src="https://nimg.ppkao.com/2017-07/jiangyouai/2017073016343188818.jpg?sign=1612b7e9303846c667536a8741f214fe&t=62d0d171" />的一个简单随机样本，则统计量<img src="https://nimg.ppkao.com/2017-07/jiangyouai/2017073016344567039.jpg?sign=2634feb77ff4529846d1495897bed4ce&t=62d0d171" />的自由度为（）。”相关的问题
A、A.<img src="https://img.ppkao.com/2018-08/longzhengxuan/2018081609061855082.jpg" />
B.<img src="https://img.ppkao.com/2018-08/longzhengxuan/2018081609062737698.jpg" />
C.<img src="https://img.ppkao.com/2018-08/longzhengxuan/2018081609063181144.jpg" />
D.<img src="https://img.ppkao.com/2018-08/longzhengxuan/2018081609063676713.jpg" />
A、A.<img src="https://img.ppkao.com/2019-05/caoguanchen/2019051516054940803.png" />
B.<img src="https://img.ppkao.com/2019-05/caoguanchen/201905151605578358.png" />
C.<img src="https://img.ppkao.com/2019-05/caoguanchen/2019051516060126354.png" />
D.<img src="https://img.ppkao.com/2019-05/caoguanchen/2019051516061047018.png" />
A、A.<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309154866509.jpg" />低电平，<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309155838776.jpg" />三态，<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309155342124.jpg" />低电平
B.<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309154866509.jpg" />三态，<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309155838776.jpg" />低电平，<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309155342124.jpg" />高电平
C.<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309154866509.jpg" />低电平，<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309155838776.jpg" />高电平，<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309155342124.jpg" />高电平
D.<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309154866509.jpg" />高电平，<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309155838776.jpg" />低电平，<img src="https://img.ppkao.com/2017-10/wangjinchen/2017101309155342124.jpg" />高电平
A、A.<img src="https://img.ppkao.com/2017-12/xieqiushi/2017120716370781231.jpg" />不变，<img src="https://img.ppkao.com/2017-12/xieqiushi/2017120716372262539.jpg" />增大
B.<img src="https://img.ppkao.com/2017-12/xieqiushi/2017120716370781231.jpg" />减小，<img src="https://img.ppkao.com/2017-12/xieqiushi/2017120716372262539.jpg" />不变
C.<img src="https://img.ppkao.com/2017-12/xieqiushi/2017120716370781231.jpg" />减小，<img src="https://img.ppkao.com/2017-12/xieqiushi/2017120716372262539.jpg" />增大
D.<img src="https://img.ppkao.com/2017-12/xieqiushi/2017120716370781231.jpg" />增大，<img src="https://img.ppkao.com/2017-12/xieqiushi/2017120716372262539.jpg" />减小
A、设总体<img src="https://img.ppkao.com/2019-04/wuacheng/2019041516264647619.jpg" />是来自X的样本，求m，p的矩估计量（对于具体样本值，若求得的<img src="https://img.ppkao.com/2019-04/wuacheng/2019041516271083671.jpg" />不是整数，则取与<img src="https://img.ppkao.com/2019-04/wuacheng/2019041516274483684.jpg" />最接近的整数作为m的估计值）。
A、A.<img src="https://img.ppkao.com/2018-04/zhouyun/20180412175605391.jpg" />
B.<img src="https://img.ppkao.com/2018-04/zhouyun/2018041217562114745.jpg" />
C.<img src="https://img.ppkao.com/2018-04/zhouyun/2018041217562651092.jpg" />
D.<img src="https://img.ppkao.com/2018-04/zhouyun/2018041217562929580.jpg" />
E.<img src="https://img.ppkao.com/2018-04/zhouyun/2018041217563332745.jpg" />
A、A.<img src="https://img.ppkao.com/2018-08/chenfang/2018081516571386102.jpg" /><img src="https://img.ppkao.com/2018-08/chenfang/2018081516572558372.jpg" />
B.<img src="https://img.ppkao.com/2018-08/chenfang/2018081516572062708.jpg" />
C.<img src="https://img.ppkao.com/2018-08/chenfang/2018081516572915872.jpg" />
D.<img src="https://img.ppkao.com/2018-08/chenfang/2018081516573482159.jpg" />
A、A.<img src="https://img.ppkao.com/2018-08/longzhengxuan/2018080116564316705.jpg" />
B.<img src="https://img.ppkao.com/2018-08/longzhengxuan/2018080116564929545.jpg" />
C.<img src="https://img.ppkao.com/2018-08/longzhengxuan/2018080116565492959.jpg" />
D.<img src="https://img.ppkao.com/2018-08/longzhengxuan/2018080116570158166.jpg" />
E.<img src="https://img.ppkao.com/2018-08/longzhengxuan/2018080116570766172.jpg" />
F.<img src="https://img.ppkao.com/2018-08/longzhengxuan/2018080116571469081.jpg" />
A、若已知空气的平均摩尔定压热容公式为<img src="https://img.ppkao.com/2019-04/caoguanchen/2019041416125998566.png" />现在确定80℃--200℃之间的平均摩尔定压热容，有人认为<img src="https://img.ppkao.com/2019-04/caoguanchen/2019041416132022370.png" />，但有人认为<img src="https://img.ppkao.com/2019-04/caoguanchen/2019041416134687800.png" />，你认为哪个正确？
A、A.<img src="https://img.ppkao.com/2017-07/wumeiyan/2017073014281280624.jpg" />
B.<img src="https://img.ppkao.com/2017-07/wumeiyan/2017073014281819043.jpg" />
C.<img src="https://img.ppkao.com/2017-07/wumeiyan/2017073014282618868.jpg" />
D.<img src="https://img.ppkao.com/2017-07/wumeiyan/2017073014283326403.jpg" />
客服
TOP
查看正确答案
