In drug developments, it is common that using evaluation variable to evaluate the effectiveness of new drugs. General evaluation methods are t-test or Analysis of Variance. These methods were on the frequency theory framework, and including the problems like multiplicity. Kawasaki and Miyaoka [1] proposed an index that shows superiority of binomial proportions in the Bayesian framework. In this study, we present new index expanded Kawasaki and Miyaoka [1] method to an index comparing mean of the normal distributions, also show usability of new index in the example.

Bayesian interiority index, normal distributions, drugs.