• 2022-06-15
    1803573b38dc769.png是来自总体[img=109x27]1803573b41cf6a9.png[/img]的样本,下列统计量中作为总体均值[img=11x18]1803573b4aebb14.png[/img]的估计量最有效的是()
    A: [img=195x43]1803573b53983d1.png[/img]
    B: [img=177x43]1803573b5c56834.png[/img]
    C: [img=195x43]1803573b6995668.png[/img]
    D: [img=195x43]1803573b71c10c1.png[/img]
  • 举一反三