A.9
B.13
C.21
D.27
A.0.88888
B.0.77777
C.0.99999
D.0.66666
A.2
B.6
C.8
D.4
A.0.54
B.0.61
C.0.64
D.0.79
A.1/5
B.2/5
C.3/5
D.4/5
A.0.2
B.1.0
C.0.5
D.0.7
A.1/6
B.1/5
C.1/3
D.1/2
A.{1,2,3,4,5}
B.{1,3,5
C.{2,4,6}
D.{0}
A.(2n+1)/3
B.2n/3
C.n/3
D.(n+1)/3
A.0.92
B.0.24
C.0.3
D.0.8
A.1
B.3
C.7
D.12
A.1/60
B.7/45
C.1/5
D.7/15
A.14.36
B.15.21
C.25.64
D.46.15
A.0.85
B.0.808
D.0.75
A.0.58
B.0.46
C.0.48
D.0.38
A.P{X=0}=0.1,P{X=1}=0.9
B.P{X=0}=0.3,P{X=1}=0.7
C.P{X=0}=0.2,P{X=1}=0.8
D.P{X=0}=0.5,P{X=1}=0.5
A.估计量的方差比较大
B.估计量的置信区间比较大
C.估计量的方差比较小
D.估计量的置信区间比较小
A.3/5
B.4/5
C.2/5
D.1/5
A.A{0}
B.B{1}
C.C{1,2}
D.D{0,1,2}