• 2022-06-15
    1803380da932fa8.png是来自总体[img=109x27]1803380db1a1e53.png[/img]的样本,下列统计量中作为总体均值[img=11x18]1803380db9f9da1.png[/img]的估计量最有效的是()
    A: [img=195x43]1803380dc24e53c.png[/img]
    B: [img=177x43]1803380dcb3e74b.png[/img]
    C: [img=195x43]1803380dd82cc46.png[/img]
    D: [img=195x43]1803380de03b803.png[/img]
  • 举一反三