{"id":14518,"date":"2025-03-07T23:00:17","date_gmt":"2025-03-07T20:00:17","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/ki-kare-testleri-ve-serbestlik-dereceleri\/"},"modified":"2025-03-07T23:00:17","modified_gmt":"2025-03-07T20:00:17","slug":"ki-kare-testleri-ve-serbestlik-dereceleri","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/ki-kare-testleri-ve-serbestlik-dereceleri\/","title":{"rendered":"Ki-Kare Testleri ve Serbestlik Dereceleri"},"content":{"rendered":"<p><body><\/p>\n<p>Ki-Kare Testleri ve Serbestlik Dereceleri<\/p>\n<p>\u0130statistiksel analizlerde s\u0131k\u00e7a kullan\u0131lan ki-kare (\u03c7\u00b2) testleri, kategorik veriler aras\u0131nda ili\u015fki olup olmad\u0131\u011f\u0131n\u0131 veya g\u00f6zlemlenen verilerin beklenen bir da\u011f\u0131l\u0131mla uyumlu olup olmad\u0131\u011f\u0131n\u0131 belirlemek i\u00e7in kullan\u0131l\u0131r.  Bu testlerin do\u011fru yorumlanabilmesi i\u00e7in serbestlik derecelerinin (df) anla\u015f\u0131lmas\u0131 olduk\u00e7a \u00f6nemlidir.  \u00d6ncelikle, ki-kare testinin ne oldu\u011funu ve hangi durumlarda kullan\u0131ld\u0131\u011f\u0131n\u0131 daha ayr\u0131nt\u0131l\u0131 inceleyelim. Ard\u0131ndan, serbestlik derecesinin bu testlerde oynad\u0131\u011f\u0131 kritik rol\u00fc ele alaca\u011f\u0131z.<\/p>\n<h2>Ki-Kare Testlerinin \u00c7e\u015fitleri ve Uygulamalar\u0131<\/h2>\n<p>Ki-kare testleri, temel olarak iki ana kategoriye ayr\u0131l\u0131r: <strong>ba\u011f\u0131ms\u0131zl\u0131k testi<\/strong> ve <strong>uyum iyili\u011fi testi<\/strong>.  Ba\u011f\u0131ms\u0131zl\u0131k testi, iki kategorik de\u011fi\u015fken aras\u0131nda bir ili\u015fki olup olmad\u0131\u011f\u0131n\u0131 ara\u015ft\u0131r\u0131rken, uyum iyili\u011fi testi ise g\u00f6zlemlenen verilerin beklenen bir da\u011f\u0131l\u0131mla ne kadar uyumlu oldu\u011funu de\u011ferlendirir.  \u00d6rne\u011fin, bir ba\u011f\u0131ms\u0131zl\u0131k testi, cinsiyet ve tercih edilen bir \u00fcr\u00fcn t\u00fcr\u00fc aras\u0131nda bir ili\u015fki olup olmad\u0131\u011f\u0131n\u0131 tespit etmek i\u00e7in kullan\u0131labilir. Benzer \u015fekilde, bir uyum iyili\u011fi testi, bir zar\u0131n adil olup olmad\u0131\u011f\u0131n\u0131 test etmek i\u00e7in kullan\u0131labilir.<\/p>\n<p>Bu testlerin uygulanmas\u0131 olduk\u00e7a yayg\u0131nd\u0131r.  Sa\u011fl\u0131k alan\u0131nda, hastal\u0131k prevalans\u0131 ile risk fakt\u00f6rleri aras\u0131ndaki ili\u015fkinin ara\u015ft\u0131r\u0131lmas\u0131nda kullan\u0131l\u0131r.  Pazarlamada, farkl\u0131 pazarlama kampanyalar\u0131n\u0131n etkinli\u011finin kar\u015f\u0131la\u015ft\u0131r\u0131lmas\u0131nda rol oynar.  Sosyal bilimlerde ise, demografik de\u011fi\u015fkenler ile tutumlar veya davran\u0131\u015flar aras\u0131ndaki ili\u015fkinin analizinde s\u0131k\u00e7a kullan\u0131l\u0131r.  K\u0131sacas\u0131, ki-kare testleri \u00e7ok \u00e7e\u015fitli alanlarda veri analizinde g\u00fc\u00e7l\u00fc bir ara\u00e7t\u0131r.<\/p>\n<h2>Serbestlik Dereceleri (df) ve \u00d6nemi<\/h2>\n<p>Serbestlik derecesi (df), bir istatistiksel testte ba\u011f\u0131ms\u0131z olarak de\u011fi\u015febilen de\u011fer say\u0131s\u0131n\u0131 ifade eder.  Ki-kare testlerinde, df, verilerin yap\u0131s\u0131na ba\u011fl\u0131 olarak hesaplan\u0131r.  \u00d6rne\u011fin, bir ba\u011f\u0131ms\u0131zl\u0131k testinde, df, (sat\u0131r say\u0131s\u0131 &#8211; 1) x (s\u00fctun say\u0131s\u0131 &#8211; 1) form\u00fcl\u00fcyle hesaplan\u0131r.  Uyum iyili\u011fi testinde ise, df, kategorilerin say\u0131s\u0131ndan 1 \u00e7\u0131kar\u0131larak bulunur.  Bu de\u011fer, ki-kare da\u011f\u0131l\u0131m tablosunda do\u011fru p-de\u011ferini bulmak i\u00e7in kullan\u0131l\u0131r.  Dolay\u0131s\u0131yla, do\u011fru df&#8217;yi hesaplamak, testin do\u011fru yorumlanmas\u0131 i\u00e7in olmazsa olmazd\u0131r.<\/p>\n<p>Peki, serbestlik derecesi neden bu kadar \u00f6nemlidir?  \u00c7\u00fcnk\u00fc ki-kare da\u011f\u0131l\u0131m\u0131, serbestlik derecesine ba\u011fl\u0131 olarak de\u011fi\u015fir.  Farkl\u0131 df de\u011ferlerine sahip ki-kare da\u011f\u0131l\u0131mlar\u0131 farkl\u0131 \u015fekillerdedir.  Do\u011fru df de\u011ferini kullanmazsan\u0131z, yanl\u0131\u015f bir p-de\u011feri elde edersiniz ve bu da yanl\u0131\u015f sonu\u00e7lara yol a\u00e7ar. Sonu\u00e7 olarak, hipotez testinizin do\u011frulu\u011fu tehlikeye girer.<\/p>\n<h2>Ki-Kare Testi Hesaplamalar\u0131 ve Yorumlamas\u0131<\/h2>\n<p>Ki-kare testi hesaplamas\u0131, g\u00f6zlemlenen frekanslar ile beklenen frekanslar aras\u0131ndaki fark\u0131n karesini alarak ve bunu beklenen frekansla b\u00f6lerek yap\u0131l\u0131r.  Bu i\u015flem t\u00fcm kategoriler i\u00e7in tekrarlan\u0131r ve sonu\u00e7lar toplanarak ki-kare istatisti\u011fi elde edilir.  Bu de\u011fer, daha sonra belirli bir serbestlik derecesine sahip ki-kare da\u011f\u0131l\u0131m tablosunda kar\u015f\u0131la\u015ft\u0131r\u0131larak p-de\u011feri bulunur.  E\u011fer p-de\u011feri \u00f6nceden belirlenen anlaml\u0131l\u0131k d\u00fczeyinden (genellikle 0.05) k\u00fc\u00e7\u00fckse,  s\u0131f\u0131r hipotezi reddedilir ve de\u011fi\u015fkenler aras\u0131nda istatistiksel olarak anlaml\u0131 bir ili\u015fki oldu\u011fu sonucuna var\u0131l\u0131r.  Aksi takdirde, s\u0131f\u0131r hipotezi reddedilemez.<\/p>\n<p>Ki-kare testleri, istatistiksel analizde g\u00fc\u00e7l\u00fc bir ara\u00e7 olmas\u0131na ra\u011fmen, baz\u0131 s\u0131n\u0131rlamalar\u0131 da vard\u0131r. \u00d6rne\u011fin, beklenen frekanslar\u0131n \u00e7ok d\u00fc\u015f\u00fck olmamas\u0131 gerekir.  K\u00fc\u00e7\u00fck beklenen frekanslar, testin g\u00fcvenirli\u011fini azaltabilir.  Ayr\u0131ca, ki-kare testi, sadece kategorik veriler i\u00e7in uygundur ve s\u00fcrekli verilerde kullan\u0131lamaz.  Bu s\u0131n\u0131rlamalar\u0131 g\u00f6z \u00f6n\u00fcnde bulundurmak, do\u011fru yorumlama yapmak i\u00e7in olduk\u00e7a \u00f6nemlidir.<\/p>\n<p>Daha detayl\u0131 bilgi i\u00e7in <a href=\"https:\/\/fatihsoysal.com\">fatihsoysal.com<\/a> adresini ziyaret edebilirsiniz.  Konu ile ilgili daha fazla bilgi i\u00e7in a\u015fa\u011f\u0131daki kaynaklara da g\u00f6z atabilirsiniz:<\/p>\n<ul>\n<li><a href=\"https:\/\/dev.to\/dorcas_bwire\/chi-square-tests-and-degrees-of-freedom-4op3\">Chi-Square Tests and Degrees of Freedom (\u0130ngilizce)<\/a><\/li>\n<\/ul>\n<h2>Sonu\u00e7<\/h2>\n<p>\u00d6zetle, ki-kare testleri ve serbestlik dereceleri, istatistiksel analizde \u00f6nemli bir rol oynar.  Bu testleri do\u011fru bir \u015fekilde uygulamak ve yorumlamak i\u00e7in, hem testin prensiplerini hem de serbestlik derecelerinin \u00f6nemini anlamak gerekir. Do\u011fru hesaplama ve yorumlama ile, ki-kare testleri, ara\u015ft\u0131rmac\u0131lar i\u00e7in de\u011ferli bilgiler sunabilir.  Ancak, testin s\u0131n\u0131rlamalar\u0131n\u0131 da g\u00f6z \u00f6n\u00fcnde bulundurmak \u00f6nemlidir.<\/p>\n<p>#Etiketler: ki-kare testi, ki-kare da\u011f\u0131l\u0131m\u0131, serbestlik derecesi, istatistik, hipotez testi, olas\u0131l\u0131k, p-de\u011feri, frekans tablosu, ba\u011f\u0131ms\u0131zl\u0131k testi, uyum iyili\u011fi testi, df, \u03c7\u00b2,  fatihsoysal.com<\/p>\n<p><\/body><br \/>\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"Ki-Kare Testleri ve Serbestlik Dereceleri \u0130statistiksel analizlerde s\u0131k\u00e7a kullan\u0131lan ki-kare (\u03c7\u00b2) testleri, kategorik veriler aras\u0131nda ili\u015fki olup olmad\u0131\u011f\u0131n\u0131&hellip;","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-14518","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Ki-Kare Testleri ve Serbestlik Dereceleri<\/title>\n<meta name=\"description\" content=\"\u0130statistiksel analizlerde s\u0131k\u00e7a kullan\u0131lan ki-kare (\u03c7\u00b2) testleri, kategorik veriler aras\u0131nda ili\u015fki olup olmad\u0131\u011f\u0131n\u0131 veya g\u00f6zlemlenen verilerin beklenen bir da\u011f\u0131l\u0131mla uyumlu olup olmad\u0131\u011f\u0131n\u0131 belirlemek i\u00e7in kullan\u0131l\u0131r. Bu testlerin do\u011fru yorumlanabilmesi i\u00e7in serbestlik derecelerinin (df) anla\u015f\u0131lmas\u0131 olduk\u00e7a \u00f6nemlidir. \u00d6ncelikle, ki-kare testinin ne oldu\u011funu ve hangi durumlarda kullan\u0131ld\u0131\u011f\u0131n\u0131 daha ayr\u0131nt\u0131l\u0131 inceleyelim. 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Bu testlerin do\u011fru yorumlanabilmesi i\u00e7in serbestlik derecelerinin (df) anla\u015f\u0131lmas\u0131 olduk\u00e7a \u00f6nemlidir. \u00d6ncelikle, ki-kare testinin ne oldu\u011funu ve hangi durumlarda kullan\u0131ld\u0131\u011f\u0131n\u0131 daha ayr\u0131nt\u0131l\u0131 inceleyelim. 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Bu testlerin do\u011fru yorumlanabilmesi i\u00e7in serbestlik derecelerinin (df) anla\u015f\u0131lmas\u0131 olduk\u00e7a \u00f6nemlidir. \u00d6ncelikle, ki-kare testinin ne oldu\u011funu ve hangi durumlarda kullan\u0131ld\u0131\u011f\u0131n\u0131 daha ayr\u0131nt\u0131l\u0131 inceleyelim. 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