有限制条件下 Poisson 分布均值的估计

Estimations of means from Poisson distributions under limited conditions

ｘ～Ｐｏｉｓｓｏｎ（λ），这里０≤λ≤λ０，λ０是已知的有限数．证明用估计量ｙ＝ｘｘ≤λ０ｘ０ｘ＞λ０｛估计λ的容许性问题．

Let χ be a random sample of Poisson(λ),where 0≤λ≤λ 0,λ 0 is a known limited number.In this paper,we discuss the problem of admissibility with the estimator y=xx≤λ 0 λ 0x>λ 0 estimates λ.