设随机变量[img=91x25]18033d2cf04c0de.png[/img],[img=100x43]18033d2cf840ff5.png[/img]且相互独立,根据切比雪夫不等式有[img=176x25]18033d2d01b0f04.png[/img]( )
A: [img=51x21]18033d2d0a6af6f.png[/img]
B: [img=37x43]18033d2d12681d7.png[/img]
C: [img=51x21]18033d2d1b654fd.png[/img]
D: [img=37x43]18033d2d247935d.png[/img]
A: [img=51x21]18033d2d0a6af6f.png[/img]
B: [img=37x43]18033d2d12681d7.png[/img]
C: [img=51x21]18033d2d1b654fd.png[/img]
D: [img=37x43]18033d2d247935d.png[/img]
举一反三
- 设随机变量[img=91x25]18033d2cf04c0de.png[/img],[img=100x43]18033d2cf840ff5.png[/img]且相互独立,根据切比雪夫不等式有[img=176x25]18033d2d01b0f04.png[/img]( ) 未知类型:{'options': ['', '', '', ''], 'type': 102}
- 1.设随机变量X的密度为[img=186x61]18034ea953ec9dd.png[/img]则常数A=________,概率[img=146x25]18034ea95d30d08.png[/img]__________. A: A=2,P(X>1|X<2)=[img=39x24]18034ea9659b618.png[/img] B: A=-2,P(X>1|X<2)=[img=39x24]18034ea9659b618.png[/img] C: A=2,P(X>1|X<2)=[img=47x44]18034ea9768a8c2.png[/img] D: A=-2,P(X>1|X<2)=[img=47x44]18034ea9768a8c2.png[/img]
- 设随机变量X~N(-2,4), 其密度函数为f(x),分布函数为F(x). 则以下选项正确的有 A: X/2~N(-1,1) B: 2X+4~N(0,16) C: P(X<0)=P(X>-4) D: [img=221x25]18032ce85042ef8.png[/img] E: [img=275x47]18032ce85c098ed.png[/img] F: (X+2)/2~N(0, 2) G: (X-2)/2~N(2, 1) H: P(X>2)=P(X<2) I: P(X>2)+P(X<-2)=1 J: [img=277x47]18032ce867a7895.png[/img] K: [img=247x43]18032ce87245061.png[/img] L: [img=255x43]18032ce87cde027.png[/img]
- 设X为随机变量,[img=173x29]1803be414ac6541.png[/img]用切比雪夫不等式估计[img=186x29]1803be4152f1081.png[/img] . A: [img=37x43]1803be415b72f05.png[/img] B: [img=37x43]1803be416366111.png[/img] C: [img=37x43]1803be416be96fe.png[/img] D: [img=37x43]1803be4174042f2.png[/img]
- 函数f(x)=[img=40x76]17e0bf8d391c13e.png[/img]的不连续点为( ) 未知类型:{'options': ['x=0', ' x=[img=43x39]17e0bf8d4513730.png[/img](k=0,±1,±2,…)', ' x=0和x=2kπ(k=0,±1,±2,…)', ' x=0和x=[img=43x39]17e0bf8d4513730.png[/img](k=0,±1,±2,…)'], 'type': 102}