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Yıl:2016; Cilt: 6; Sayı: 3>> Özet
TAM METİN
Journal of Mood Disorders; 2016;6(3):180-182
Ki-kare Testi
S Kılıç
GATA Epidemiyoloji Bilim Dalı Başkanlığı, Ankara
Ki-kare testi kesikli değişkenlerin dağılımının bir diğerinden farklı olup olmadığını değerlendirmek için kullanılır. Ki-kare testi iki veya daha fazla bağımsız gruplar arasında kesikli değişkenlere ait sayımları karşılaştırır. Daha uygun bir yaklaşım olan Yates’in süreklilik düzeltmesi uygulaması ise, her hücre için “gözlenmiş değer – beklenen değer” farkından 0.5 değerinin çıkarılmasıyla hesaplanır. Küçük örnek büyüklüğü olan karşılaştırmalarda Fisher’in kesin testi kullanılır. Anahtar sözcükler: Ki-kare testi, beklenen frekans, gözlenen frekans
Chi-square Test
The Chi square (?2 ) test is used to examine whether distributions of categorical variables differ from one another. The Chi Square statistic compares the counts of categorical responses between two (or more) independent groups. Pearson’s chi-square test is most widely used of many chi-square test. A better approximation can be calculated by reducing the absolute value of each difference between observed and expected frequencies by 0.5; which is called Yates’s correction for continuity. Fisher’s exact test is employed when sample size is small in comparisions.

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