{"id":2980,"date":"2023-07-19T19:18:55","date_gmt":"2023-07-19T19:18:55","guid":{"rendered":"https:\/\/statorials.org\/tr\/duyarlilikla-ilgili-pozitif-tahmin-degeri\/"},"modified":"2023-07-19T19:18:55","modified_gmt":"2023-07-19T19:18:55","slug":"duyarlilikla-ilgili-pozitif-tahmin-degeri","status":"publish","type":"post","link":"https:\/\/statorials.org\/tr\/duyarlilikla-ilgili-pozitif-tahmin-degeri\/","title":{"rendered":"Hassasiyete kar\u015f\u0131 pozitif tahmin de\u011feri: fark nedir?"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Bir <a href=\"https:\/\/statorials.org\/tr\/regresyon-ve-siniflandirma\/\" target=\"_blank\" rel=\"noopener\">s\u0131n\u0131fland\u0131rma modelinin<\/a> performans\u0131n\u0131 de\u011ferlendirmenin en yayg\u0131n yollar\u0131ndan biri, modelin tahmin edilen sonu\u00e7lar\u0131n\u0131 veri k\u00fcmesinin ger\u00e7ek sonu\u00e7lar\u0131na g\u00f6re \u00f6zetleyen bir kar\u0131\u015f\u0131kl\u0131k matrisi olu\u015fturmakt\u0131r.<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-25783 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/pospred1-2.jpg\" alt=\"\" width=\"360\" height=\"165\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Kar\u0131\u015f\u0131kl\u0131k matrisinde s\u0131kl\u0131kla ilgilendi\u011fimiz iki \u00f6l\u00e7\u00fcm <strong>pozitif tahmin de\u011feri<\/strong> ve <strong>hassasiyettir<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\"><span style=\"color: #000000;\"><b>Pozitif tahmin de\u011feri,<\/b> pozitif tahmin edilen sonuca sahip bir g\u00f6zlemin ger\u00e7ekte pozitif bir sonuca <em>sahip olma<\/em> olas\u0131l\u0131\u011f\u0131d\u0131r.<\/span><\/span><\/p>\n<p> <span style=\"color: #000000;\">A\u015fa\u011f\u0131daki \u015fekilde hesaplan\u0131r:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><b>Pozitif tahmin de\u011feri<\/b> = Ger\u00e7ek Pozitifler \/ (Do\u011fru Pozitifler + Yanl\u0131\u015f Pozitifler)<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-25784 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/pospred2.jpg\" alt=\"\" width=\"548\" height=\"191\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\"><b>Duyarl\u0131l\u0131k<\/b> , pozitif sonu\u00e7 veren bir g\u00f6zlemin ger\u00e7ekte pozitif tahmin edilen sonuca sahip olma olas\u0131l\u0131\u011f\u0131d\u0131r.<\/span><\/p>\n<p> <span style=\"color: #000000;\">A\u015fa\u011f\u0131daki \u015fekilde hesaplan\u0131r:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><b>Hassasiyet<\/b> = Ger\u00e7ek Pozitifler \/ (Do\u011fru Pozitifler + Yanl\u0131\u015f Negatifler)<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-25785 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/pospred3.jpg\" alt=\"\" width=\"385\" height=\"240\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">A\u015fa\u011f\u0131daki \u00f6rnekte bu iki metri\u011fin pratikte nas\u0131l hesaplanaca\u011f\u0131 g\u00f6sterilmektedir.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>\u00d6rnek: Pozitif tahmin de\u011ferinin ve duyarl\u0131l\u0131\u011f\u0131n hesaplanmas\u0131<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Bir doktorun 400 ki\u015finin belirli bir hastal\u0131\u011fa sahip olup olmad\u0131\u011f\u0131n\u0131 tahmin etmek i\u00e7in <a href=\"https:\/\/statorials.org\/tr\/lojistik-regresyon-1\/\" target=\"_blank\" rel=\"noopener\">lojistik regresyon modeli<\/a> kulland\u0131\u011f\u0131n\u0131 varsayal\u0131m.<\/span><\/p>\n<p> <span style=\"color: #000000;\">A\u015fa\u011f\u0131daki kar\u0131\u015f\u0131kl\u0131k matrisi, modelin yapt\u0131\u011f\u0131 tahminleri \u00f6zetlemektedir:<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-25788 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/pospred5.jpg\" alt=\"\" width=\"520\" height=\"164\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\"><strong>Pozitif tahmin de\u011ferini<\/strong> \u015fu \u015fekilde hesaplayabiliriz:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><b>Pozitif tahmin de\u011feri<\/b> = Ger\u00e7ek Pozitifler \/ (Do\u011fru Pozitifler + Yanl\u0131\u015f Pozitifler)<\/span><\/li>\n<li> <span style=\"color: #000000;\"><b>Pozitif \u00f6ng\u00f6r\u00fc de\u011feri<\/b> = 15 \/ (15 + 10)<\/span><\/li>\n<li> <span style=\"color: #000000;\"><b>Pozitif tahmin de\u011feri<\/b> = 0,60<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Bu bize test sonucu pozitif \u00e7\u0131kan birinin ger\u00e7ekten hastal\u0131\u011fa <em>sahip olma<\/em> olas\u0131l\u0131\u011f\u0131n\u0131n <strong>0,60<\/strong> oldu\u011funu s\u00f6yl\u00fcyor.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Duyarl\u0131l\u0131\u011f\u0131<\/strong> \u015fu \u015fekilde hesaplayabiliriz:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>Hassasiyet<\/strong> = Ger\u00e7ek Pozitifler \/ (Do\u011fru Pozitifler + Yanl\u0131\u015f Negatifler)<\/span><\/li>\n<li> <span style=\"color: #000000;\"><b><strong>Hassasiyet<\/strong><\/b> = 15 \/ (15 + 5)<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>Hassasiyet<\/strong> = 0,75<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Bu bize, hastal\u0131\u011fa sahip birinin ger\u00e7ekten pozitif test sonucu alma ihtimalinin <strong>0,75<\/strong> oldu\u011funu s\u00f6yl\u00fcyor.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Ek kaynaklar<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">A\u015fa\u011f\u0131daki e\u011fitimler, farkl\u0131 istatistiksel yaz\u0131l\u0131mlarda kar\u0131\u015f\u0131kl\u0131k matrisinin nas\u0131l olu\u015fturulaca\u011f\u0131n\u0131 a\u00e7\u0131klamaktad\u0131r:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/tr\/excel-matris-karisikligi\/\" target=\"_blank\" rel=\"noopener\">Excel&#8217;de Kar\u0131\u015f\u0131kl\u0131k Matrisi Nas\u0131l Olu\u015fturulur<\/a><br \/> <a href=\"https:\/\/statorials.org\/tr\/rde-matris-karisikligi\/\" target=\"_blank\" rel=\"noopener\">R&#8217;de bir kar\u0131\u015f\u0131kl\u0131k matrisi nas\u0131l olu\u015fturulur<\/a><br \/> <a href=\"https:\/\/statorials.org\/tr\/python-matris-karisikligi\/\" target=\"_blank\" rel=\"noopener\">Python&#8217;da Kar\u0131\u015f\u0131kl\u0131k Matrisi Nas\u0131l Olu\u015fturulur<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Bir s\u0131n\u0131fland\u0131rma modelinin performans\u0131n\u0131 de\u011ferlendirmenin en yayg\u0131n yollar\u0131ndan biri, modelin tahmin edilen sonu\u00e7lar\u0131n\u0131 veri k\u00fcmesinin ger\u00e7ek sonu\u00e7lar\u0131na g\u00f6re \u00f6zetleyen bir kar\u0131\u015f\u0131kl\u0131k matrisi olu\u015fturmakt\u0131r. Kar\u0131\u015f\u0131kl\u0131k matrisinde s\u0131kl\u0131kla ilgilendi\u011fimiz iki \u00f6l\u00e7\u00fcm pozitif tahmin de\u011feri ve hassasiyettir . Pozitif tahmin de\u011feri, pozitif tahmin edilen sonuca sahip bir g\u00f6zlemin ger\u00e7ekte pozitif bir sonuca sahip olma olas\u0131l\u0131\u011f\u0131d\u0131r. A\u015fa\u011f\u0131daki \u015fekilde hesaplan\u0131r: [&hellip;]<\/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-2980","post","type-post","status-publish","format-standard","hentry","category-rehber"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Hassasiyete kar\u015f\u0131 pozitif tahmin de\u011feri: fark nedir? - Statorials<\/title>\n<meta name=\"description\" content=\"Bu e\u011fitimde pozitif tahmin de\u011feri ile istatistikteki duyarl\u0131l\u0131k aras\u0131ndaki fark bir \u00f6rnekle a\u00e7\u0131klanmaktad\u0131r.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/statorials.org\/tr\/duyarlilikla-ilgili-pozitif-tahmin-degeri\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hassasiyete kar\u015f\u0131 pozitif tahmin de\u011feri: fark nedir? 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