First, likelihood ratio statistics for checking the hypothesis of equal variances of two-dimensional Gaussian vectors are derived both under the standard ( σ 2 1 , σ 2 2 , ) -parametrization and under the geometric (a, b,α)-parametrization where a2 and b2 are the variances of the principle components and α is an angle of rotation. Then, the likelihood ratio statistics for checking the hypothesi...

The unified hybrid censoring is a mixture of generalized Type-I and Type-II hybrid censoring schemes. This article presents the statistical inferences on Generalized Exponential Distribution parameters when the data are obtained from the unified hybrid censoring scheme. It is observed that the maximum likelihood estimators can not be derived in closed form. The EM algorithm for computing the ma...

Standardized likelihood ratio test (SLRT) for testing the equality of means of several log-normal distributions is proposed. The properties of the SLRT and an available modified likelihood ratio test (MLRT) and a generalized variable (GV) test are evaluated by Monte Carlo simulation and compared. Evaluation studies indicate that the SLRT is accurate even for small samples, whereas the MLRT coul...

Likelihood ratio policy gradient methods have been some of the most successful reinforcement learning algorithms, especially for learning on physical systems. We describe how the likelihood ratio policy gradient can be derived from an importance sampling perspective. This derivation highlights how likelihood ratio methods under-use past experience by (i) using the past experience to estimate on...

b a c k g r oun d & aim: berg balance scale (bbs) is one of the most applied tests to identify high-risk elderly people for fall. fall is a common health problem among community senior citizens. a diag- nostic test to identify high-risk elderly people can prevent or alleviate falls. the purpose of this study was to determine the accuracy of bbs to predict falls among elderly community dwellers....