Bu e\u011fitimde SAS’ta Welch t testinin nas\u0131l ger\u00e7ekle\u015ftirilece\u011fi a\u00e7\u0131klanmaktad\u0131r.<\/span><\/p>\n Bir \u00f6\u011fretmenin s\u0131nava haz\u0131rlanmak i\u00e7in s\u0131nava haz\u0131rl\u0131k kitap\u00e7\u0131\u011f\u0131 kullanan 12 \u00f6\u011frencinin s\u0131nav sonu\u00e7lar\u0131n\u0131 kullanmayan 12 \u00f6\u011frenciyle kar\u015f\u0131la\u015ft\u0131rmak istedi\u011fini varsayal\u0131m.<\/span><\/p>\n A\u015fa\u011f\u0131daki listeler her gruptaki \u00f6\u011frencilerin s\u0131nav sonu\u00e7lar\u0131n\u0131 g\u00f6stermektedir:<\/span><\/p>\n Kitap\u00e7\u0131k<\/strong> : 90, 85, 88, 89, 94, 91, 79, 83, 87, 88, 91, 90<\/span><\/p>\n Defter Yok<\/strong> : 67, 90, 71, 95, 88, 83, 72, 66, 75, 86, 93, 84<\/span><\/p>\n Ortalama s\u0131nav puan\u0131n\u0131n iki grup aras\u0131nda e\u015fit olup olmad\u0131\u011f\u0131n\u0131 belirlemek amac\u0131yla Welch t-testini ger\u00e7ekle\u015ftirmek i\u00e7in a\u015fa\u011f\u0131daki ad\u0131mlar\u0131 kullan\u0131n.<\/span><\/p>\n Ad\u0131m 1: Verileri 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 Ad\u0131m 2: Welch’in t-testini ger\u00e7ekle\u015ftirin.<\/strong><\/span><\/p>\n Daha sonra Welch t-testini ger\u00e7ekle\u015ftirmek i\u00e7in proc ttetest’i<\/strong> kullanaca\u011f\u0131z:<\/span> <\/p>\n Varyanslar\u0131n E\u015fitli\u011fi<\/strong> ba\u015fl\u0131kl\u0131 son tablo, iki \u00f6rnek aras\u0131ndaki varyanslar\u0131n e\u015fit olup olmad\u0131\u011f\u0131n\u0131 belirlemek i\u00e7in bir F testi ger\u00e7ekle\u015ftirir.<\/span><\/p>\n Bu F testi a\u015fa\u011f\u0131daki bo\u015f ve alternatif hipotezleri kullan\u0131r:<\/span><\/p>\n Bu testin p de\u011feri ( 0,0046<\/strong> ) 0,05’ten k\u00fc\u00e7\u00fck oldu\u011fundan s\u0131f\u0131r hipotezini reddediyoruz. Bu, iki \u00f6rne\u011fin varyanslar\u0131n\u0131n e\u015fit olmad\u0131\u011f\u0131 anlam\u0131na gelir.<\/span><\/p>\n Bu nedenle, hangi t de\u011ferinin ve kar\u015f\u0131l\u0131k gelen p de\u011ferinin kullan\u0131laca\u011f\u0131n\u0131 belirlemek i\u00e7in sondan bir \u00f6nceki tabloda E\u015fitsiz<\/strong> etiketli sat\u0131ra bakmam\u0131z gerekir:<\/span><\/p>\n Welch t testinin a\u015fa\u011f\u0131daki bo\u015f ve alternatif hipotezleri kulland\u0131\u011f\u0131n\u0131 hat\u0131rlay\u0131n:<\/span><\/p>\n P de\u011feri ( 0,0417<\/strong> ) 0,05’ten k\u00fc\u00e7\u00fck oldu\u011fundan s\u0131f\u0131r hipotezini reddediyoruz.<\/span><\/p>\n Bu, iki grup aras\u0131ndaki ortalama s\u0131nav puan\u0131n\u0131n e\u015fit olmad\u0131\u011f\u0131n\u0131 s\u00f6yleyecek yeterli kan\u0131t\u0131m\u0131z oldu\u011fu anlam\u0131na geliyor.<\/span><\/p>\n Bonus<\/strong> : Welch’in t-testini herhangi iki \u00f6rnek i\u00e7in otomatik olarak ger\u00e7ekle\u015ftirmek \u00fczere bu Welch’in t-testi hesaplay\u0131c\u0131s\u0131n\u0131<\/a> kullanmaktan \u00e7ekinmeyin.<\/span><\/p>\n A\u015fa\u011f\u0131daki e\u011fitimlerde SAS’ta di\u011fer yayg\u0131n istatistiksel testlerin nas\u0131l ger\u00e7ekle\u015ftirilece\u011fi a\u00e7\u0131klanmaktad\u0131r:<\/span><\/p>\n SAS’ta tek \u00f6rnekli t testi nas\u0131l yap\u0131l\u0131r?<\/a> Welch t testi, iki grubun e\u015fit varyansa sahip oldu\u011fu varsay\u0131lmad\u0131\u011f\u0131nda , iki ba\u011f\u0131ms\u0131z grup aras\u0131ndaki ortalamalar\u0131 kar\u015f\u0131la\u015ft\u0131rmak i\u00e7in kullan\u0131l\u0131r. Bu e\u011fitimde SAS’ta Welch t testinin nas\u0131l ger\u00e7ekle\u015ftirilece\u011fi a\u00e7\u0131klanmaktad\u0131r. \u00d6rnek: SAS’ta Welch’in t testi Bir \u00f6\u011fretmenin s\u0131nava haz\u0131rlanmak i\u00e7in s\u0131nava haz\u0131rl\u0131k kitap\u00e7\u0131\u011f\u0131 kullanan 12 \u00f6\u011frencinin s\u0131nav sonu\u00e7lar\u0131n\u0131 kullanmayan 12 \u00f6\u011frenciyle kar\u015f\u0131la\u015ft\u0131rmak istedi\u011fini varsayal\u0131m. A\u015fa\u011f\u0131daki listeler her […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-2552","post","type-post","status-publish","format-standard","hentry","category-rehber"],"yoast_head":"\n \u00d6rnek: SAS’ta Welch’in t testi<\/strong><\/h3>\n
\/*create dataset*\/\n<\/span>data<\/span> exam_scores;\n input<\/span> group $score;\n datalines<\/span> ;\nbooklet 90\nbooklet 85\nbooklet 88\nbooklet 89\nbooklet 94\nbooklet 91\nbooklet 79\nbooklet 83\nbooklet 87\nbooklet 88\nbooklet 91\nbooklet 90\nno_booklet 67\nno_booklet 90\nno_booklet 71\nno_booklet 95\nno_booklet 88\nno_booklet 83\nno_booklet 72\nno_booklet 66\nno_booklet 75\nno_booklet 86\nno_booklet 93\nno_booklet 84\n;\nrun<\/span> ;<\/span><\/span><\/strong><\/pre>\n \/*perform Welch's t-test*\/\n<\/span>proc ttest data<\/span> =exam_scores alpha<\/span> = 0.05<\/span> ;\n classgroup<\/span> ;\n var<\/span> score;\nrun<\/span> ;\n<\/span><\/span><\/strong><\/pre>\n![\"\"](\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/welch1.jpg\")
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Ek kaynaklar<\/strong><\/span><\/h3>\n
SAS’ta iki \u00f6rnekli t testi nas\u0131l yap\u0131l\u0131r?
SAS’ta e\u015fle\u015ftirilmi\u015f \u00f6rnekler t testi nas\u0131l ger\u00e7ekle\u015ftirilir?<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"