【单选题】矩估计的基本思想是【 】。
A.
用使样本出现可能性最大的参数作为总体参数的估计
D.
用出现可能性最大的样本参数作为总体参数的估计
【简答题】Dear Emily, I like your TV programs very much. I’m now writing to ask you something about American social customs. My American friends want me to join them in their dinner party. I am very happy and h...
【单选题】矩估计的基本思想是( )。
A.
用使样本出现可能性最大的参数作为总体参数的估计
D.
用出现可能性最大的样本参数作为总体参数的估计
【简答题】有一建筑给水系统,引入管起始点高程为 -0.8m ,最不利用水点高程为22 .0m,从引入管至最不利点的沿程压力损失值为9.8 KPa,水流经过总水表和分户水表的压力损失值为6.9KPa、4.9 KPa,最不利配水点流出水头为1.5mH2O,外网的压力为0.2MPa,试为该建筑给水系统选择合适的给水方式。
【单选题】Dear Emily, I like your TV programs very much. I’m now writing to ask you something about American social customs( 习俗 ). My American friends want me to join them in their dinner party. I am very happy...
A.
Zhang Hong doesn’t like Emily ’s programs
B.
Zhang Hong is very worried.
C.
Zhang Hong’s friends ask her to a dinner party.
【单选题】采用三端式集成稳压电路7912的稳压电源,其输出( )。