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Physical Sciences and Mathematics Commons™
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Full-Text Articles in Physical Sciences and Mathematics
A Bayesian Subset Analysis Of Sensory Evaluation Data, Balgobin Nandram
A Bayesian Subset Analysis Of Sensory Evaluation Data, Balgobin Nandram
Journal of Modern Applied Statistical Methods
In social sciences it is easy to carry out sensory experiments using say a J-point hedonic scale. One major problem with the J-point hedonic scale is that a conversion from the category scales to numeric scores might not be sensible because the panelists generally view increments on the hedonic scale as psychologically unequal. In the current problem several products are rated by a set of panelists on the J-point hedonic scale. One objective is to select the best subset of products and to assess the quality of the products by estimating the mean and standard deviation response …
The Bayesian Two-Sample T-Test, Mithat Gonen, Wesley O. Johnson, Yonggang Lu, Peter H. Westfall
The Bayesian Two-Sample T-Test, Mithat Gonen, Wesley O. Johnson, Yonggang Lu, Peter H. Westfall
Memorial Sloan-Kettering Cancer Center, Dept. of Epidemiology & Biostatistics Working Paper Series
In this article we show how the pooled-variance two-sample t-statistic arises from a Bayesian formulation of the two-sided point null testing problem, with emphasis on teaching. We identify a reasonable and useful prior giving a closed-form Bayes factor that can be written in terms of the distribution of the two-sample t-statistic under the null and alternative hypotheses respectively. This provides a Bayesian motivation for the two-sample t-statistic, which has heretofore been buried as a special case of more complex linear models, or given only roughly via analytic or Monte Carlo approximations. The resulting formulation of the Bayesian test is easy …