• 2022-05-27
    ‌设总体X服从正态分布 [img=109x27]1803da26c2d171a.png[/img] ,其中[img=11x18]1803da26cc86700.png[/img]未知,[img=18x22]1803da26d59d20b.png[/img]已知,[img=114x23]1803da26de5dd16.png[/img]为样本,[img=99x60]1803da26e6fc68f.png[/img],则[img=11x18]1803da26cc86700.png[/img]的置信水平为0.95的置信区间是‍
    A: [img=216x43]1803da26fae58ae.png[/img]
    B: [img=216x43]1803da2705a0873.png[/img]
    C: [img=229x43]1803da27111e48e.png[/img]
    D: [img=231x43]1803da271c1d4f3.png[/img]
  • 举一反三