The scores of grape wine given by wine critics have differences, therefore, for which its credibility differs. Firstly, our paper analysis differences of overall and individual for the two groups of raters. The analys...The scores of grape wine given by wine critics have differences, therefore, for which its credibility differs. Firstly, our paper analysis differences of overall and individual for the two groups of raters. The analysis method is： first check the score whether meets the normal distribution or not by Chi-square and then test whether the mean of the two group＇s ratings is equal or not, through t-test, to illustrate the differences of the two groups＇ ratings. Secondly this paper respectively characterizes the credibility of each group＇s rating with the variance and gray correlation. Both the results are highly consistent on the credibility, so they can support each other. This score comparison method can be further extended to a similar scoring system.展开更多
文摘The scores of grape wine given by wine critics have differences, therefore, for which its credibility differs. Firstly, our paper analysis differences of overall and individual for the two groups of raters. The analysis method is： first check the score whether meets the normal distribution or not by Chi-square and then test whether the mean of the two group＇s ratings is equal or not, through t-test, to illustrate the differences of the two groups＇ ratings. Secondly this paper respectively characterizes the credibility of each group＇s rating with the variance and gray correlation. Both the results are highly consistent on the credibility, so they can support each other. This score comparison method can be further extended to a similar scoring system.
