设[img=114x23]1803bb164397e1b.png[/img]为来自总体N(0,1)的简单随机样本,[img=15x22]1803bb164c3ea3f.png[/img]为样本均值,[img=19x22]1803bb16546db12.png[/img]为样本方差,则
A: [img=104x27]1803bb165c4b200.png[/img]
B: [img=97x27]1803bb1665a7f11.png[/img]
C: [img=158x48]1803bb166e47974.png[/img]
D: [img=187x69]1803bb167a89ab5.png[/img]
A: [img=104x27]1803bb165c4b200.png[/img]
B: [img=97x27]1803bb1665a7f11.png[/img]
C: [img=158x48]1803bb166e47974.png[/img]
D: [img=187x69]1803bb167a89ab5.png[/img]
举一反三
- 设[img=114x23]1803bb164397e1b.png[/img]为来自总体N(0,1)的简单随机样本,[img=15x22]1803bb164c3ea3f.png[/img]为样本均值,[img=19x22]1803bb16546db12.png[/img]为样本方差,则 未知类型:{'options': ['', '', '', ''], 'type': 102}
- 设总体X服从N(0,1),[img=113x23]180318bc2bf48df.png[/img]是来自总体的简单随机样本,其样本均值为[img=15x22]180318bc341ceee.png[/img],样本方差为[img=19x22]180318bc3c3bae3.png[/img],则() A: [img=93x27]180318bc43a5199.png[/img] B: [img=97x27]180318bc4b7f3cf.png[/img] C: [img=173x27]180318bc54417ee.png[/img] D: [img=95x27]180318bc5cd8886.png[/img]
- 设总体X服从N(0,1),[img=113x23]180318bef28473b.png[/img]是来自总体的简单随机样本,其样本均值为[img=15x22]180318befb13556.png[/img],样本方差为[img=19x22]180318bf0453dc9.png[/img],则( ) A: [img=93x27]180318bf0cd0359.png[/img] B: [img=97x27]180318bf152a1e0.png[/img] C: [img=173x27]180318bf1e9a281.png[/img] D: [img=95x27]180318bf27610c4.png[/img]
- 设总体[img=216x27]1802d3d28825139.png[/img]是总体X的简单随机样本,[img=15x22]1802d3d29096bcd.png[/img]是样本均值,[img=19x22]1802d3d298ef94b.png[/img]是样本方差,则[img=119x27]1802d3d2a11874c.png[/img]
- 设总体[img=216x27]180326058506206.png[/img]是总体X的简单随机样本,[img=15x22]180326058caa417.png[/img]是样本均值,[img=19x22]1803260594c8624.png[/img]是样本方差,则[img=119x27]180326059dbde0f.png[/img]