若随机变量X的方差D(X)存在,a为常数,则【图片】
举一反三
- 若随机变量X的方差D(X)存在,a为常数,则[img=249x67]17de6027232ca89.png[/img] 未知类型:{'options': ['D(X)', '1', '', 'a 2D(X)'], 'type': 102}
- 若随机变量X的方差D(X)存在,a为常数,则[img=249x67]1802f2c16f96412.png[/img] A: D(X) B: 1 C: [img=58x66]1802f2c17877038.png[/img] D: a 2D(X)
- 若随机变量X的方差D(X)存在,a为常数,则[img=249x67]1802f2c2b6e46d0.png[/img] A: D(X) B: 1 C: [img=58x66]1802f2c2bf3c80f.png[/img] D: a 2D(X)
- 若随机变量X的方差D(X)存在,a为常数,则[img=249x67]18031e9705442a0.png[/img] A: D(X) B: 1 C: [img=58x66]18031e970dc4937.png[/img] D: a 2D(X)
- 若随机变量X的方差D(X)存在,a为常数,则[img=249x67]1803c07cf914aaa.png[/img] A: D(X) B: 1 C: [img=58x66]1803c07d00c9eff.png[/img] D: a 2D(X)