设X1，X2，…，X n为来自总体X的简单随机样本且[img=64x23]18033925f8f91e8.png[/img]，则下列各项中是[img=11x18]1803392601e063e.png[/img]的无偏估计量的是 ( )(A) [img=61x63]180339260a5838d.png[/img] (B) [img=92x60]18033926131a911.png[/img] (C) [img=61x60]180339261bec0e5.png[/img] (D) [img=92x63]18033926249bcaa.png[/img]
A: [img=61x63]180339262d3400d.png[/img]
B: [img=92x60]1803392635b215f.png[/img]
C: [img=61x60]180339263e82595.png[/img]
D: [img=92x63]1803392647c2f2c.png[/img]
A: [img=61x63]180339262d3400d.png[/img]
B: [img=92x60]1803392635b215f.png[/img]
C: [img=61x60]180339263e82595.png[/img]
D: [img=92x63]1803392647c2f2c.png[/img]
举一反三
- 设X1，X2，…，X n为来自总体X的简单随机样本且[img=64x23]18039964a72fe1f.png[/img]，则下列各项中是[img=11x18]18039964af0ed28.png[/img]的无偏估计量的是 ( )(A) [img=61x63]18039964b841fd2.png[/img] (B) [img=92x60]18039964c1eb933.png[/img] (C) [img=61x60]18039964cae8a54.png[/img] (D) [img=92x63]18039964d380ce4.png[/img] A: [img=61x63]18039964dbf10d8.png[/img] B: [img=92x60]18039964e3b4882.png[/img] C: [img=61x60]18039964ebcb449.png[/img] D: [img=92x63]18039964f4ecdb6.png[/img]
- 设X1，X2，…，X n为来自总体X的简单随机样本且[img=64x23]1803dfee3cb66a6.png[/img]，则下列各项中是[img=11x18]1803dfee44ace2b.png[/img]的无偏估计量的是 ( )(A) [img=61x63]1803dfee4d09584.png[/img] (B) [img=92x60]1803dfee54ee9b6.png[/img] (C) [img=61x60]1803dfee5c485f6.png[/img] (D) [img=92x63]1803dfee64f1838.png[/img] A: [img=61x63]1803dfee6d41144.png[/img] B: [img=92x60]1803dfee75ff9a8.png[/img] C: [img=61x60]1803dfee7ed5044.png[/img] D: [img=92x63]1803dfee874dc28.png[/img]
- 设X1，X2，…，X n为来自总体X的简单随机样本且[img=64x23]1803aac303025a0.png[/img]，则下列各项中是[img=11x18]1803aac30bff284.png[/img]的无偏估计量的是 ( )(A) [img=61x63]1803aac3139e2f9.png[/img] (B) [img=92x60]1803aac31bcd9dc.png[/img] (C) [img=61x60]1803aac3251944a.png[/img] (D) [img=92x63]1803aac32d25960.png[/img] A: [img=61x63]1803aac3357035b.png[/img] B: [img=92x60]1803aac33d62ea6.png[/img] C: [img=61x60]1803aac3455d137.png[/img] D: [img=92x63]1803aac34d2d423.png[/img]
- 设X1，X2，…，X n为来自总体X的简单随机样本且[img=64x23]1803195429dde09.png[/img]，则下列各项中是[img=11x18]180319543266b22.png[/img]的无偏估计量的是 ( )(A) [img=61x63]180319543a26b7a.png[/img] (B)[img=92x60]1803195442a082e.png[/img] (C)[img=61x60]180319544c1fc3c.png[/img] (D)[img=92x63]1803195455459dd.png[/img] A: [img=61x63]180319545d8cb02.png[/img] B: [img=92x60]18031954659f0f6.png[/img] C: [img=61x60]180319546e90329.png[/img] D: [img=92x63]18031954777105b.png[/img]
- 设X1，X2，…，X n为来自总体X的简单随机样本且[img=64x23]1803195290f4e61.png[/img]，则下列各项中是[img=11x18]1803195298c842e.png[/img]的无偏估计量的是 ( )(A) [img=61x63]18031952a1e8366.png[/img] (B) [img=92x60]18031952aa6d009.png[/img] (C) [img=61x60]18031952b1f12d5.png[/img] (D) [img=92x63]18031952ba31b1c.png[/img] A: [img=61x63]18031952c272da9.png[/img] B: [img=92x60]18031952ca71772.png[/img] C: [img=61x60]18031952d2e0921.png[/img] D: [img=92x63]18031952db6cb76.png[/img]