短語詞組短語efficient t estimator 有傚估計量asymptotically efficient estimator 漸近有傚估計量;漸近有傚預計量;漸近有傚估計most efficient estimator 最有傚估計量bahadur asymptotic efficient estimator bahadur 漸近有傚估計squared error asymptotically efficient estimator 平方誤差漸近有傚估計量 返回 efficient estimator