设总体X的分布律为[img=248x25]1802d3b58e53bea.png[/img],其中0<θ<1为待估未知参数。从总体抽取容量为2的样本X[img=50x23]1802d3b597bd28e.png[/img],以下估计量不是[img=9x19]1802d3b59fcfdf8.png[/img]的无偏估计量的是
A: [img=22x22]1802d3b5a8798b9.png[/img]
B: [img=65x22]1802d3b5b0ba5e7.png[/img]
C: [img=97x25]1802d3b5b95d167.png[/img]
D: [img=53x22]1802d3b5c1f9f57.png[/img]
E: [img=53x22]1802d3b5cb6cb62.png[/img]
F: [img=128x25]1802d3b5d44c010.png[/img]
G: [img=105x22]1802d3b5dcaa46b.png[/img]
H: [img=114x22]1802d3b5e4633bf.png[/img]
A: [img=22x22]1802d3b5a8798b9.png[/img]
B: [img=65x22]1802d3b5b0ba5e7.png[/img]
C: [img=97x25]1802d3b5b95d167.png[/img]
D: [img=53x22]1802d3b5c1f9f57.png[/img]
E: [img=53x22]1802d3b5cb6cb62.png[/img]
F: [img=128x25]1802d3b5d44c010.png[/img]
G: [img=105x22]1802d3b5dcaa46b.png[/img]
H: [img=114x22]1802d3b5e4633bf.png[/img]
A,B,C
举一反三
- 设总体X的分布律为[img=248x25]18033e139949d74.png[/img],其中0<θ<1为待估未知参数。从总体抽取容量为2的样本X[img=50x23]18033e13a24c466.png[/img],以下估计量不是[img=9x19]18033e13aace0fb.png[/img]的无偏估计量的是 A: [img=22x22]18033e13b2e81d0.png[/img] B: [img=65x22]18033e13bccaa6b.png[/img] C: [img=97x25]18033e13c5810ef.png[/img] D: [img=53x22]18033e13ce3c909.png[/img] E: [img=53x22]18033e13d699776.png[/img] F: [img=128x25]18033e13dedad93.png[/img] G: [img=105x22]18033e13e750bed.png[/img] H: [img=114x22]18033e13efc8593.png[/img]
- 设总体X的分布律为[img=248x25]180365c7d005b87.png[/img],其中0<θ<1为待估未知参数。从总体抽取容量为2的样本X[img=50x23]180365c7d8bf362.png[/img],以下估计量不是[img=9x19]180365c7e0d6948.png[/img]的无偏估计量的是 A: [img=22x22]180365c7e97d360.png[/img] B: [img=65x22]180365c7f2663ca.png[/img] C: [img=97x25]180365c7fb30b03.png[/img] D: [img=53x22]180365c804ce9e2.png[/img] E: [img=53x22]180365c80d92c1a.png[/img] F: [img=128x25]180365c81662d4f.png[/img] G: [img=105x22]180365c82051a76.png[/img] H: [img=114x22]180365c82d4d6ed.png[/img]
- 设总体X的分布律为[img=248x25]1802dac976d6e81.png[/img],其中0<θ<1为待估未知参数。从总体抽取容量为2的样本X[img=50x23]1802dac97fd3abb.png[/img],以下估计量不是[img=9x19]1802dac987c7aed.png[/img]的无偏估计量的是 A: [img=22x22]1802dac98ee34f1.png[/img] B: [img=65x22]1802dac99845f00.png[/img] C: [img=97x25]1802dac9a107547.png[/img] D: [img=53x22]1802dac9a9878a8.png[/img] E: [img=53x22]1802dac9b298673.png[/img] F: [img=128x25]1802dac9ba82716.png[/img] G: [img=105x22]1802dac9c303d21.png[/img] H: [img=114x22]1802dac9cbef585.png[/img]
- 设总体X的分布律为[img=248x25]18034b9abb0663c.png[/img],其中0<θ<1为待估未知参数。从总体抽取容量为2的样本X[img=50x23]18034b9ac46c7ae.png[/img],以下估计量不是[img=9x19]18034b9acd34e54.png[/img]的无偏估计量的是 A: [img=22x22]18034b9ad6219c8.png[/img] B: [img=65x22]18034b9adf46339.png[/img] C: [img=97x25]18034b9ae859708.png[/img] D: [img=53x22]18034b9af1b0b39.png[/img] E: [img=53x22]18034b9afaaf4a9.png[/img] F: [img=128x25]18034b9b037e7dc.png[/img] G: [img=105x22]18034b9b0c1b07c.png[/img] H: [img=114x22]18034b9b153d319.png[/img]
- 不等式[img=146x24]18031ef3f198106.png[/img]的解集是() A: {x|-3<x<5} B: R C: {x|x>5或x<-3} D: {x|-5<x<3}
内容
- 0
已知(X,Y)的联合分布律为:[img=520x161]1803e1674fcfa1e.jpg[/img]则P(X≤0, |Y|<1)等于 A: 2/9 B: 1/3 C: 5/9 D: 5/6
- 1
已知(X,Y)的联合分布律为:[img=520x161]1803c332db8081b.jpg[/img]则P(X≤0, |Y|1)等于 A: 2/9 B: 1/3 C: 5/9 D: 5/6
- 2
求微分方程 [img=635x61]17da6537085dd29.png[/img] 的特解; ( ) A: (3*sin(5*x))/exp(2*x) B: exp(2*x) C: (3*sin(5*x)) D: (3*cos(5*x))/exp(2*x)
- 3
求不定积分[img=115x46]17da65382f8e1b9.png[/img]; ( ) A: x - (5*log(x + 1))/4 - (3*log(x - 3)) B: (5*log(x + 1))/4 - (3*log(x - 3)) C: x - (5*log(x + 1))/4 - (3*log(x - 3))/4 D: (5*log(x + 1))/4 - (3*log(x - 3))/4
- 4
设随机变量X的概率密度为f(x)=[img=155x62]17e44250ec079f8.png[/img],则k= ( ) A: 1 B: 5 C: 2 D: 3