A generalization of the Wilcoxon signed-rank test and its applications

被引:135
|
作者
Taheri, S. M. [1 ,2 ]
Hesamian, G. [1 ]
机构
[1] Isfahan Univ Technol, Dept Math Sci, Esfahan 8415683111, Iran
[2] Ferdowsi Univ Mashhad, Sch Math Sci, Dept Stat, Mashhad 9177948974, Iran
关键词
Fuzzy observation; Fuzzy test statistic; Fuzzy critical value; Preference degree; Fuzzy significance level; FUZZY RANDOM-VARIABLES; VAGUE DATA; P-VALUE; HYPOTHESES; NUMBERS;
D O I
10.1007/s00362-012-0443-4
中图分类号
O21 [概率论与数理统计]; C8 [统计学];
学科分类号
020208 ; 070103 ; 0714 ;
摘要
This paper extends the Wilcoxon signed-rank test to the case where the available observations are imprecise quantities, rather than crisp. To do this, the associated test statistic is extended, using the alpha-cuts approach. In addition, the concept of critical value is generalized to the case when the significance level is given by a fuzzy number. Finally, to accept or reject the null hypothesis of interest, a preference degree between two fuzzy sets is employed for comparing the observed fuzzy test statistic and fuzzy critical value.
引用
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页码:457 / 470
页数:14
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