下列函数为某随机变量分布函数的是( )
A: [img=147x51]1803da2c66a5b7e.png[/img]
B: [img=147x51]1803da2c729df7f.png[/img]
C: [img=147x51]1803da2c8046cdf.png[/img]
D: [img=147x51]1803da2c8d3d444.png[/img]
A: [img=147x51]1803da2c66a5b7e.png[/img]
B: [img=147x51]1803da2c729df7f.png[/img]
C: [img=147x51]1803da2c8046cdf.png[/img]
D: [img=147x51]1803da2c8d3d444.png[/img]
举一反三
- 下列函数为某随机变量分布函数的是( ) A: [img=147x51]1803da313d4f8ce.png[/img] B: [img=147x51]1803da314765637.png[/img] C: [img=147x51]1803da315079b01.png[/img] D: [img=147x51]1803da315b1d819.png[/img]
- 下列函数为某随机变量分布函数的是( ) A: [img=147x51]18035741a576509.png[/img] B: [img=147x51]18035741b07ac0c.png[/img] C: [img=147x51]18035741b87c3b1.png[/img] D: [img=147x51]18035741c342f15.png[/img]
- 下列函数为分布函数的是( ) A: [img=147x51]18033813826d533.png[/img] B: [img=147x51]180338138e1c502.png[/img] C: [img=147x51]1803381396fb5b0.png[/img] D: [img=147x51]18033813a2b53c8.png[/img]
- 下列函数在x=0处不连续的是 A: [img=174x62]18030f433744822.png[/img] B: [img=116x46]18030f43400084b.png[/img] C: [img=147x51]18030f434c73d4a.png[/img] D: [img=131x45]18030f4354e60b8.png[/img]
- 已知随机变量X的分布函数为[img=136x49]1803b69024c8270.png[/img] ,则X的均值和方差分别为 A: E(X)=2, D(X)=4 B: E(X)=4, D(x)=2 C: [img=162x43]1803b6902cd8bfb.png[/img] D: [img=162x43]1803b69034d9ffd.png[/img]