• 2022-05-29
    设样本的观测值为-1,-2,0,1,2,则样本标准误为
    A: [img=38x24]180344de9aba479.png[/img]
    B: [img=26x23]180344dea4c59f1.png[/img]
    C: [img=35x24]180344deafbdb06.png[/img]
    D: [img=36x24]180344deb9c1946.png[/img]