Two Necessary and Sufflclent Condijions for the Most Efficient of A Parameterss
zhang shangzhi Jiangxi Vniversity
In this paper, We have obtained the following results: Theoreml A necessary and sufficient condifion for an esfimate Tto be most e- fficient is the reltionship (?)logL/(?)θ=c(θ) [T(s)-θ] a. s for all θ∈Θ hald Theorem 2 A neccessary and sufficient conditionfor an estimate T to be most efficient is that T be sufficient and the relationship (?)logf_T/(?)θ=c(θ) [T(s)-θ] a. s for all θ∈Θ hold.