• 2022-06-06
    设总体[img=146x27]180367d3fbee02d.png[/img]均未知. [img=86x23]180367d4048913e.png[/img]是总体X的样本, 样本均值[img=15x22]180367d40d2ee00.png[/img]是μ的无偏估计量,若测得样本均值观测值为[img=44x18]180367d415b5816.png[/img],则以下结果正确的是
    A: [img=44x22]180367d41e0fb23.png[/img]
    B: [img=109x27]180367d426b7ba2.png[/img]
    C: [img=109x27]180367d42f05df6.png[/img]
    D: [img=103x25]180367d436ccacc.png[/img]
  • 举一反三