• 2022-06-15
    1803da2427c70df.png是来自总体[img=109x27]1803da24307da1f.png[/img]的样本,下列统计量中作为总体均值[img=11x18]1803da243a1a8aa.png[/img]的估计量最有效的是( )
    A: [img=195x43]1803da24425f1ec.png[/img]
    B: [img=195x43]1803da244c2343b.png[/img]
    C: [img=195x43]1803da2455b8870.png[/img]
    D: [img=195x43]1803da245e6e70e.png[/img]
  • 举一反三