• 2022-06-16
    若总体[img=146x27]180367d77680882.png[/img]均未知,检验假设[img=186x26]180367d77f3ce8d.png[/img]已取得容量为9的样本,[img=19x22]180367d787f1625.png[/img]是样本方差,若[img=51x22]180367d790a5094.png[/img],则P_值为
    A: 0.9331
    B: 0.9576
    C: 0.0669
    D: 0.0424