• 2022-05-29
    设总体X的均值为0,方差[img=18x22]1802d3bc090c189.png[/img]未知,[img=101x23]1802d3bc1173ab3.png[/img]是X的简单随机样本,[img=15x22]1802d3bc19d3d17.png[/img]是样本均值,则以下哪个选项是总体方差[img=18x22]1802d3bc23a0f1a.png[/img]的矩估计量?
    A: [img=67x60]1802d3bc2d36622.png[/img]
    B: [img=116x60]1802d3bc3a61fc2.png[/img]
    C: [img=147x60]1802d3bc46e18a3.png[/img]
    D: [img=103x60]1802d3bc5014b97.png[/img]
    E: [img=95x60]1802d3bc598ca28.png[/img]
    F: [img=52x60]1802d3bc6295b15.png[/img]
    G: [img=22x26]1802d3bc6ae7d21.png[/img]