• 2022-06-03
    1803573d12c5a47.png是来自总体[img=109x27]1803573d1aec62f.png[/img]的样本,下列统计量中作为总体均值[img=11x18]1803573d22e672e.png[/img]的估计量最有效的是( )
    A: [img=195x43]1803573d2b7303a.png[/img]
    B: [img=195x43]1803573d34362da.png[/img]
    C: [img=195x43]1803573d41b9995.png[/img]
    D: [img=195x43]1803573d49b4835.png[/img]
  • 举一反三