{"id":2555,"date":"2023-07-21T18:27:56","date_gmt":"2023-07-21T18:27:56","guid":{"rendered":"https:\/\/statorials.org\/tr\/mann-whitney-sasta-teste-girdin\/"},"modified":"2023-07-21T18:27:56","modified_gmt":"2023-07-21T18:27:56","slug":"mann-whitney-sasta-teste-girdin","status":"publish","type":"post","link":"https:\/\/statorials.org\/tr\/mann-whitney-sasta-teste-girdin\/","title":{"rendered":"Sas'ta mann-whitney u testi nas\u0131l yap\u0131l\u0131r?"},"content":{"rendered":"

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Mann-Whitney U testi<\/strong> (bazen Wilcoxon s\u0131ralama toplam\u0131 testi olarak da adland\u0131r\u0131l\u0131r), numune da\u011f\u0131l\u0131mlar\u0131 normal da\u011f\u0131lmad\u0131\u011f\u0131nda ve numune boyutlar\u0131 k\u00fc\u00e7\u00fck oldu\u011funda (n < 30) iki numune aras\u0131ndaki farklar\u0131 kar\u015f\u0131la\u015ft\u0131rmak i\u00e7in kullan\u0131l\u0131r.<\/span><\/p>\n

\u0130ki \u00f6rnekli t testinin<\/a> parametrik olmayan e\u015fde\u011feri olarak kabul edilir.<\/span><\/p>\n

Bu e\u011fitimde SAS’ta Mann-Whitney U testinin nas\u0131l ger\u00e7ekle\u015ftirilece\u011fi a\u00e7\u0131klanmaktad\u0131r.<\/span><\/p>\n

\u00d6rnek: SAS’ta Mann-Whitney U testi<\/strong><\/span><\/h3>\n

Ara\u015ft\u0131rmac\u0131lar\u0131n, yak\u0131t i\u015fleminin bir araban\u0131n ortalama mpg’sinde bir de\u011fi\u015fikli\u011fe neden olup olmad\u0131\u011f\u0131n\u0131 bilmek istediklerini varsayal\u0131m. Bunu test etmek i\u00e7in, yak\u0131t i\u015flemeli 12 araban\u0131n ve yak\u0131t i\u015flemesiz 12 araban\u0131n mpg’sini \u00f6l\u00e7t\u00fckleri bir deney y\u00fcr\u00fct\u00fcyorlar.<\/span><\/p>\n

Sonu\u00e7lar a\u015fa\u011f\u0131da g\u00f6sterilmektedir:<\/span> <\/p>\n

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\u00d6rnek boyutlar\u0131 k\u00fc\u00e7\u00fck oldu\u011fundan ve \u00f6rnek da\u011f\u0131l\u0131mlar\u0131n\u0131n normal da\u011f\u0131lmad\u0131\u011f\u0131ndan<\/a> \u015f\u00fcphelendikleri i\u00e7in, iki grup aras\u0131nda mpg’de istatistiksel olarak anlaml\u0131 bir fark olup olmad\u0131\u011f\u0131n\u0131 belirlemek i\u00e7in Mann-Whitney U testi yapmaya karar verirler.<\/span><\/p>\n

SAS’ta Mann-Whitney U testi ger\u00e7ekle\u015ftirmek i\u00e7in a\u015fa\u011f\u0131daki ad\u0131mlar\u0131 izleyin.<\/span><\/p>\n

1. Ad\u0131m: Veri k\u00fcmesini olu\u015fturun<\/strong><\/span><\/p>\n

\u00d6ncelikle SAS’ta veri k\u00fcmesini olu\u015fturmak i\u00e7in a\u015fa\u011f\u0131daki kodu kullanaca\u011f\u0131z:<\/span><\/p>\n

 \/*create dataset*\/\n<\/span>data<\/span> mpg_data;\n    input<\/span> group $mpg;\n    datalines<\/span> ;\ntreated 24\ntreated 25\ntreated 21\ntreated 22\ntreated 23\ntreated 18\ntreated 17\ntreated 28\ntreated 24\ntreated 27\ntreated 21\ntreated 23\nuntreated 20\nuntreated 23\nuntreated 21\nuntreated 25\nuntreated 18\nuntreated 17\nuntreated 18\nuntreated 24\nuntreated 20\nuntreated 24\nuntreated 23\nuntreated 19\n;\nrun<\/span> ;\n<\/strong><\/pre>\n
 Ad\u0131m 2: Mann Whitney U Testini yap\u0131n<\/strong><\/span><\/p>\n
 Daha sonra Mann Whitney U testini ger\u00e7ekle\u015ftirmek i\u00e7in proc npar1way’i<\/strong> kullanaca\u011f\u0131z:<\/span> <\/p>\n
 \/*perform Mann Whitney U test*\/\n<\/span>proc npar1way<\/span> data<\/span> =mpg_data wilcoxon<\/span> ;\n    classgroup<\/span> ;\n    var<\/span> mpg;<\/span>\nrun;<\/span><\/strong> <\/pre>\n
\"\"<\/p>\n
 Wilcoxon iki \u00f6rnekli test tablosundan testin iki kuyruklu p de\u011ferinin 0,2114<\/strong> oldu\u011funu g\u00f6r\u00fcyoruz.<\/span><\/p>\n
 Mann Whitney U testinin a\u015fa\u011f\u0131daki bo\u015f ve alternatif hipotezleri kulland\u0131\u011f\u0131n\u0131 unutmay\u0131n:<\/span><\/p>\n