High Quality Content by WIKIPEDIA articles! In statistics, the score, score function, efficient score or informant plays an important role in several aspects of inference. For example: in formulating a test statistic for a locally most powerful test; in approximating the error in a maximum likelihood estimate; in demonstrating the asymptotic sufficency of a maximum likelihood estimate; in the formulation of confidence intervals; in demonstrations of the Cramér Rao inequality. The score function also plays an important role in computational statistics, as it can play a part in the computation of maximum likelihood estimates.