设随机变量X的方差存在，则
A: [img=205x46]1802df9bae249b9.jpg[/img]
B: [img=207x51]1802df9bb8978cd.jpg[/img]
C: [img=201x54]1802df9bc3f9716.jpg[/img]
D: [img=206x53]1802df9bcf5ff51.jpg[/img]
A: [img=205x46]1802df9bae249b9.jpg[/img]
B: [img=207x51]1802df9bb8978cd.jpg[/img]
C: [img=201x54]1802df9bc3f9716.jpg[/img]
D: [img=206x53]1802df9bcf5ff51.jpg[/img]
举一反三
- 设随机变量X的方差存在，则 A: [img=205x46]180398df8db3c08.jpg[/img] B: [img=207x51]180398df9888bd1.jpg[/img] C: [img=201x54]180398dfa3efc73.jpg[/img] D: [img=206x53]180398dfae7b156.jpg[/img]
- 设随机变量X的方差存在，则 A: [img=205x46]1803a7e70651e53.jpg[/img] B: [img=207x51]1803a7e71120b83.jpg[/img] C: [img=201x54]1803a7e71c653e8.jpg[/img] D: [img=206x53]1803a7e727682b0.jpg[/img]
- 设随机变量X的方差存在，则 A: [img=205x46]1803cc853d25e99.jpg[/img] B: [img=207x51]1803cc85472b0f4.jpg[/img] C: [img=201x54]1803cc8551c0b81.jpg[/img] D: [img=206x53]1803cc855cf353e.jpg[/img]
- 设随机变量X的方差存在，则 A: [img=205x46]18039e1665cc598.jpg[/img] B: [img=207x51]18039e16710af77.jpg[/img] C: [img=201x54]18039e167d37335.jpg[/img] D: [img=206x53]18039e168a37ca3.jpg[/img]
- 设随机变量X的方差存在，则 A: [img=205x46]1803477251da9f2.jpg[/img] B: [img=207x51]180347725d6a6f7.jpg[/img] C: [img=201x54]180347726981fac.jpg[/img] D: [img=206x53]18034772752f516.jpg[/img]