一个由n=50的随机样本,算得样本均值[img=53x18]180366945316035.png[/img],总体标准差为6.总体均值[img=11x18]180366945b10f83.png[/img]的95%置信区间为()
A: [img=72x20]18036694637b70d.png[/img]
B: [img=72x20]180366946ce9cd0.png[/img]
C: [img=72x20]18036694752667b.png[/img]
D: [img=72x20]180366947d0f4ad.png[/img]
A: [img=72x20]18036694637b70d.png[/img]
B: [img=72x20]180366946ce9cd0.png[/img]
C: [img=72x20]18036694752667b.png[/img]
D: [img=72x20]180366947d0f4ad.png[/img]
举一反三
- 一个由n=50的随机样本,算得样本均值[img=53x18]1802e3f65de621d.png[/img],总体标准差为6.总体均值[img=11x18]1802e3f6660559e.png[/img]的95%置信区间为() A: [img=72x20]1802e3f66df6845.png[/img] B: [img=72x20]1802e3f675f24d1.png[/img] C: [img=72x20]1802e3f67e625a4.png[/img] D: [img=72x20]1802e3f68867647.png[/img]
- 一个由n=50的随机样本,算得样本均值[img=53x18]1803946bd4e87b2.png[/img],总体标准差为6.总体均值[img=11x18]1803946bdd56dc9.png[/img]的95%置信区间为() A: [img=72x20]1803946be6b21fe.png[/img] B: [img=72x20]1803946befbf692.png[/img] C: [img=72x20]1803946bf800705.png[/img] D: [img=72x20]1803946bffd2ec7.png[/img]
- 一个由n=50的随机样本,算得样本均值[img=53x18]18033d8c3161ee8.png[/img],总体标准差为6.总体均值[img=11x18]18033d8c3a67ebf.png[/img]的95%置信区间为() A: [img=72x20]18033d8c42f90e0.png[/img] B: [img=72x20]18033d8c4ba488e.png[/img] C: [img=72x20]18033d8c542ee13.png[/img] D: [img=72x20]18033d8c5d294aa.png[/img]
- 一个由n=50的随机样本,算得样本均值[img=53x18]1802e3e4bcfb7a9.png[/img],总体标准差为6.总体均值[img=11x18]1802e3e4c6b54f5.png[/img]的95%置信区间为() A: [img=72x20]1802e3e4cf8e40e.png[/img] B: [img=72x20]1802e3e4d949a10.png[/img] C: [img=72x20]1802e3e4e2ff912.png[/img] D: [img=72x20]1802e3e4eb79ead.png[/img]
- 一个由n=50的随机样本,算得样本均值[img=53x18]1802e3e72fb6ed7.png[/img],总体标准差为6.总体均值[img=11x18]1802e3e738e5c26.png[/img]的95%置信区间为() A: [img=72x20]1802e3e74185f1a.png[/img] B: [img=72x20]1802e3e74ae8b38.png[/img] C: [img=72x20]1802e3e7539fbce.png[/img] D: [img=72x20]1802e3e75da301f.png[/img]