设随机变量X的数学期望E(X)和方差D(X)存在,则对于则对任意[img=42x19]1803c05f1fe5dee.png[/img],有
A: [img=232x45]1803c05f2a721a1.png[/img]
B: [img=232x45]1803c05f3485b6a.png[/img]
C: [img=246x45]1803c05f3f9aac9.png[/img]
D: [img=246x45]1803c05f49a5d72.png[/img]
A: [img=232x45]1803c05f2a721a1.png[/img]
B: [img=232x45]1803c05f3485b6a.png[/img]
C: [img=246x45]1803c05f3f9aac9.png[/img]
D: [img=246x45]1803c05f49a5d72.png[/img]
举一反三
- 设随机变量X的数学期望E(X)和方差D(X)存在,则对于则对任意[img=42x19]1803a56347a152e.png[/img],有 A: [img=232x45]1803a56352649c7.png[/img] B: [img=232x45]1803a5635c14362.png[/img] C: [img=246x45]1803a5636671a11.png[/img] D: [img=246x45]1803a56370c5296.png[/img]
- 设随机变量X的数学期望E(X)和方差D(X)存在,则对于则对任意[img=42x19]1802f64c4899510.png[/img],有( ) A: [img=215x45]1802f64c529f89f.png[/img] B: [img=207x45]1802f64c5c66a24.png[/img] C: [img=232x45]1802f64c67c8b81.png[/img] D: [img=232x45]1802f64c73179d7.png[/img]
- 设随机变量X的数学期望E(X)和方差D(X)存在,则对于则对任意[img=42x19]1803a563f7be37b.png[/img],有( ) A: [img=215x45]1803a56402a383f.png[/img] B: [img=207x45]1803a5640e4d64d.png[/img] C: [img=232x45]1803a5641a5b0c8.png[/img] D: [img=232x45]1803a564253f3e3.png[/img]
- 设随机变量X的数学期望E(X)和方差D(X)存在,则对于则对任意[img=42x19]1803a55a07e3da5.png[/img],下列错误的有 A: [img=215x45]1803a55a1372ef6.png[/img] B: [img=207x45]1803a55a1f29189.png[/img] C: [img=232x45]1803a55a2b522f3.png[/img] D: [img=232x45]1803a55a377caa6.png[/img]
- 设随机变量X的数学期望E(X)和方差D(X)存在,则对于则对任意[img=42x19]1803534e2518b61.png[/img],下列错误的有 A: [img=215x45]1803534e2fce2dc.png[/img] B: [img=207x45]1803534e3a85472.png[/img] C: [img=232x45]1803534e448149f.png[/img] D: [img=232x45]1803534e508eee9.png[/img]