• 2022-06-03
    1803da2659c5f64.png是来自总体[img=109x27]1803da266220b80.png[/img]的样本,下列统计量中作为总体均值[img=11x18]1803da266a62669.png[/img]的估计量最有效的是()‍‎‍
    A: [img=195x43]1803da26730c997.png[/img]
    B: [img=177x43]1803da267bc3993.png[/img]
    C: [img=195x43]1803da2688c94d5.png[/img]
    D: [img=195x43]1803da2691bcb69.png[/img]
  • 举一反三