• 2022-06-18
    设[img=114x23]1803bb164397e1b.png[/img]为来自总体N(0,1)的简单随机样本,[img=15x22]1803bb164c3ea3f.png[/img]为样本均值,[img=19x22]1803bb16546db12.png[/img]为样本方差,则
    A: [img=104x27]1803bb165c4b200.png[/img]
    B: [img=97x27]1803bb1665a7f11.png[/img]
    C: [img=158x48]1803bb166e47974.png[/img]
    D: [img=187x69]1803bb167a89ab5.png[/img]