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单项选择题

由10只实验老鼠组成的样本,其死亡时间(以天为单位)为:3,4,5,7,7,8,10,10,10,12。假定适合的生存模型为指数分布(密度函数为f (t )=λe-λt,t>0),则运用矩方法和中位数估计法来估计参数λ分别为()。

A.0.13158,0.08664
B.0.13158,0.09120
C.0.13158,0.09242
D.0.13333,0.09120
E.0.13333,0.09242