A.0.315045
B.0.315127
C.0.315269
D.0.315298
E.0.315312
[单选题]已知,则f30=( )。A.0.5B.0.6C.0.7D.0.8E.0.9
[单选题]已知:=0.015,=0.030。减因1(工作中途退职)中终止力服从均匀分布,减因2(工作期间伤残)在年中发生,则和的值分别为( )。A.0.014
[单选题]计算和的估计值分别为( )。A.0.05,0.0024B.0.10,0.0045C.0.15,0.0064D.0.30,0.0105E.0.40,0
[单选题]假设,,在多减因模型中的各减因导致的减少人数服从均匀分布,则=( )。A.1/11B.2/11C.5/11D.9/11E.10/11
[单选题]计算和的估计值分别为( )。A.1.14286,0.02381B.1.14286,0.14286C.1.94591,0.14286D.1.94591
[单选题]已知(1);(2);(3)=。运用K-J修匀法,求()()=( )。A.B.C.D.E.
[单选题]已知,0≤x≤80,则20岁人的剩余寿命的方差为( )。A.45B.46C.47.7D.289.3E.326.5
[单选题]已知在死亡时间均匀分布的假设下,(0.5q30+μ30.5)/5.25q50=( )。A.0.25517B.0.02257C.0.02517D.0.
[单选题]已知,则必有( ).A.B.C.D.
[单选题]已知,则=( )。A.10.5B.12.5C.13.5D.15.5E.16.5