تفاصيل الوثيقة نوع الوثيقة : مقال في مجلة دورية  عنوان الوثيقة : A new weighted rank correlation A new weighted rank correlation   الموضوع : رياضيات وإحصاء  لغة الوثيقة : الانجليزية  المستخلص : Problem Statement: There have been many cases in real life where two independent sources have ranked n objects, with the interest focused on agreement in the top rankings. Spearman's rho and Kendall's tau coefficients assigned equal weights to all rankings. As a result, the literature proposed several weighted correlation coefficients with emphasis on the top rankings, including the top-down, weighted Kendall's Tau and Blest's correlation coefficient. Approach: This article introduced a new weighted rank correlation coefficient that was sensitive to agreement in the top rankings. It presented the limiting distribution under the null hypothesis of independence and provided a summary of quantiles of the exact null distribution for n = 3(1)9. Results: The article summarized the power comparison between the new weighted coefficient and other weighted coefficients, and showed that the new weighted rank correlation coefficient provided the locally most powerful rank test. Conclusions/Recommendations: The new weighted correlation should be used along with other weighted coefficients when the interest focused on agreement in the top rankings, in order to make an effective inference. © 2008 Science Publications.  ردمد : 1549-3644  اسم الدورية : Journal of Mathematics and Statistics, 4 (4), pp. 226-230  المجلد : 4  العدد : 4  سنة النشر : 2008 هـ 2008 م  عدد الصفحات : 5  نوع المقالة : مقالة علمية  تاريخ الاضافة على الموقع : Thursday, October 15, 2009  الباحثون اسم الباحث (عربي) اسم الباحث (انجليزي) نوع الباحث المرتبة العلمية البريد الالكتروني تهاني عبدالصمد عامر مطيوري Tahani A. Maturi باحث دكتوراه tmaturi@kau.edu.sa Ezz H. Abdelfattah Ezz H. Abdelfattah باحث دكتوراه   الرجوع إلى صفحة الأبحاث