设X~N(3,4),则下列式子一定成立的是
A: [img=171x25]18035732d746ddf.png[/img]
B: [img=171x25]18035732dffab5f.png[/img]
C: [img=203x29]18035732e87254a.png[/img]
D: [img=171x25]18035732f18e5d9.png[/img]
A: [img=171x25]18035732d746ddf.png[/img]
B: [img=171x25]18035732dffab5f.png[/img]
C: [img=203x29]18035732e87254a.png[/img]
D: [img=171x25]18035732f18e5d9.png[/img]
举一反三
- 设X~N(3,4),则下列式子一定成立的是_______. A: [img=171x25]1803da12a999070.png[/img] B: [img=171x25]1803da12b2b1355.png[/img] C: [img=203x29]1803da12c1f00ea.png[/img] D: [img=171x25]1803da12cafb6e1.png[/img]
- 设X~N(3,4),则下列式子一定成立的是 A: [img=171x25]1803da10c8790f7.png[/img] B: [img=171x25]1803da10d0c82ce.png[/img] C: [img=203x29]1803da10ddc0186.png[/img] D: [img=171x25]1803da10e6959d9.png[/img]
- 设X~N(3,4),则下列式子一定成立的是 A: [img=171x25]180338061155487.png[/img] B: [img=171x25]1803380619bbe49.png[/img] C: [img=203x29]18033806222f39a.png[/img] D: [img=171x25]180338062af8584.png[/img]
- 设X~N(3,4),则下列式子一定成立的是_______. A: [img=171x25]18035734a47ac36.png[/img] B: [img=171x25]18035734ac45d48.png[/img] C: [img=203x29]18035734b877a06.png[/img] D: [img=171x25]18035734c092ec5.png[/img]
- 设X~N(3,4),则下列式子一定成立的是 A: [img=171x25]1803da1597b071a.png[/img] B: [img=171x25]1803da15a10a676.png[/img] C: [img=203x29]1803da15a8f3c7e.png[/img] D: [img=171x25]1803da15b291aad.png[/img]