葡萄酒评价； t检验； 方差分析； 可信度 |
Difference and Reliability of Wine Evaluation
School of Math and Statistics, Northeast Petroleum University, Daqing, Heilongjiang 163318, China
The study aimed at investigating the difference and the reliability of wine evaluation between two groups of wine judges. Firstly, the average score of each item for each type of wine was calculated. Then the average of each item and its corresponding weight worked out the product. With each wine judge as the basic unit, the score of ten attributes were added up as the standard score of evaluation for each group (namely, the quality of wine). Through the verification of the hypothesis – whether the mean of the two independent normal subjects was equal or not, we reached the conclusion that there was no significant difference in wine evaluation. Besides, the standard deviation method was adopted to judge the credibility of wine evaluation results.
wine evaluation; t test; variance analysis; reliability