{"id":672,"date":"2023-07-29T03:25:22","date_gmt":"2023-07-29T03:25:22","guid":{"rendered":"https:\/\/statorials.org\/pl\/test-mcnemarsa-r\/"},"modified":"2023-07-29T03:25:22","modified_gmt":"2023-07-29T03:25:22","slug":"test-mcnemarsa-r","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/test-mcnemarsa-r\/","title":{"rendered":"Jak wykona\u0107 test mcnemara w r"},"content":{"rendered":"

<\/p>\n

\n

Test McNemara<\/strong> s\u0142u\u017cy do okre\u015blenia, czy istnieje statystycznie istotna r\u00f3\u017cnica w proporcjach pomi\u0119dzy sparowanymi danymi.<\/span><\/p>\n

W tym samouczku wyja\u015bniono, jak wykona\u0107 test McNemara w j\u0119zyku R.<\/span><\/p>\n

Przyk\u0142ad: test McNemara w R<\/strong><\/span><\/h2>\n

Za\u0142\u00f3\u017cmy, \u017ce badacze chc\u0105 wiedzie\u0107, czy okre\u015blony film marketingowy mo\u017ce zmieni\u0107 opinie ludzi na temat konkretnego prawa. Przeprowadzaj\u0105 ankiet\u0119 w\u015br\u00f3d 100 os\u00f3b, aby dowiedzie\u0107 si\u0119, czy popieraj\u0105 prawo. Nast\u0119pnie pokazuj\u0105 film marketingowy wszystkim 100 osobom i ponownie przeprowadzaj\u0105 z nimi ankiet\u0119 po zako\u0144czeniu filmu.<\/span><\/p>\n

Poni\u017csza tabela przedstawia \u0142\u0105czn\u0105 liczb\u0119 os\u00f3b, kt\u00f3re popar\u0142y ustaw\u0119 przed i po obejrzeniu filmu:<\/span><\/p>\n\n\n\n\n\n\n
<\/th>\n Film przed marketingiem<\/span><\/th>\n<\/tr>\n
Film po wprowadzeniu na rynek<\/span><\/td>\n Wsparcie<\/strong><\/span><\/td>\n Nie mog\u0119 znie\u015b\u0107<\/strong><\/span><\/td>\n<\/tr>\n
Wsparcie<\/strong><\/span><\/td>\n 30<\/span><\/td>\n 40<\/span><\/td>\n<\/tr>\n
Nie mog\u0119 znie\u015b\u0107<\/strong><\/span><\/td>\n 12<\/span><\/td>\n 18<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Aby ustali\u0107, czy istnia\u0142a statystycznie istotna r\u00f3\u017cnica w odsetku os\u00f3b popieraj\u0105cych prawo przed i po obejrzeniu filmu, mo\u017cemy wykona\u0107 test McNemara.<\/span><\/p>\n

Krok 1: Utw\u00f3rz dane.<\/strong><\/span><\/p>\n

Najpierw utw\u00f3rz zbi\u00f3r danych w formie rastrowej.<\/span><\/p>\n

 #create data<\/span>\ndata <- matrix(c(30, 12, 40, 18), nrow = 2,\n    dimnames = list(\"After Video\" = c(\"Support\", \"Do Not Support\"),\n                    \"Before Video\" = c(\"Support\", \"Do Not Support\")))\n\n#view data\n<\/span>data\n\n                Before Video\nAfter Video Support Do Not Support\n  Bracket 30 40\n  Do Not Support 12 18\n<\/strong><\/pre>\n
 Krok 2: Wykonaj test McNemara.<\/strong><\/span><\/p>\n
 Nast\u0119pnie wykonaj test McNemara, stosuj\u0105c nast\u0119puj\u0105c\u0105 sk\u0142adni\u0119:<\/span><\/p>\n
 mcnemar.test(x,y=NULL,poprawne=PRAWDA)<\/span><\/strong><\/p>\n
 Z\u0142oto:<\/span><\/p>\n
    \n
  •  x<\/strong> : albo dwuwymiarowa tabela kontyngencji w postaci macierzy, albo obiekt czynnikowy.<\/span><\/li>\n
  •  y<\/strong> : obiekt czynnikowy; ignorowane, je\u015bli x jest macierz\u0105.<\/span><\/li>\n
  •  poprawne<\/strong> : TRUE = zastosuj korekcj\u0119 ci\u0105g\u0142o\u015bci przy obliczaniu statystyk testowych; FA\u0141SZ = nie stosuj korekty ci\u0105g\u0142o\u015bci.<\/span><\/li>\n<\/ul>\n
     Og\u00f3lnie rzecz bior\u0105c, korekt\u0119 ci\u0105g\u0142o\u015bci nale\u017cy zastosowa\u0107, gdy niekt\u00f3re zliczenia w tabeli s\u0105 niskie. Zwykle t\u0119 korekt\u0119 stosuje si\u0119, gdy liczba kom\u00f3rek jest mniejsza ni\u017c 5.<\/span><\/p>\n
     Dla zilustrowania r\u00f3\u017cnic przeprowadzimy test McNemara z korekcj\u0105 ci\u0105g\u0142o\u015bci i bez niej:<\/span><\/p>\n
     #Perform McNemar's Test with continuity correction<\/span>\nmcnemar.test(data)\n\n\tMcNemar's Chi-squared test with continuity correction\n\ndata:data\nMcNemar's chi-squared = 14.019, df = 1, p-value = 0.000181\n\n#Perform McNemar's Test without continuity correction<\/span>\nmcnemar.test(data, correct=FALSE) \n\n\tMcNemar's Chi-squared test\n\ndata:data\nMcNemar's chi-squared = 15.077, df = 1, p-value = 0.0001032<\/strong><\/pre>\n
     W obu przypadkach warto\u015b\u0107 p testu jest mniejsza ni\u017c 0,05, zatem odrzuciliby\u015bmy hipotez\u0119 zerow\u0105 i doszli\u015bmy do wniosku, \u017ce odsetek os\u00f3b, kt\u00f3re popar\u0142y prawo przed i po obejrzeniu filmu marketingowego, r\u00f3\u017cni\u0142 si\u0119 statystycznie.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"
    Test McNemara s\u0142u\u017cy do okre\u015blenia, czy istnieje statystycznie istotna r\u00f3\u017cnica w proporcjach pomi\u0119dzy sparowanymi danymi. W tym samouczku wyja\u015bniono, jak wykona\u0107 test McNemara w j\u0119zyku R. Przyk\u0142ad: test McNemara w R Za\u0142\u00f3\u017cmy, \u017ce badacze chc\u0105 wiedzie\u0107, czy okre\u015blony film marketingowy mo\u017ce zmieni\u0107 opinie ludzi na temat konkretnego prawa. Przeprowadzaj\u0105 ankiet\u0119 w\u015br\u00f3d 100 os\u00f3b, aby dowiedzie\u0107 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-672","post","type-post","status-publish","format-standard","hentry","category-przewodnik"],"yoast_head":"\nJak wykona\u0107 test McNemara w R - Statology<\/title>\n<meta name=\"description\" content=\"Proste wyja\u015bnienie sposobu wykonania testu McNemara w R, wraz z przyk\u0142adem krok po kroku.\" \/>\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\/pl\/test-mcnemarsa-r\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jak wykona\u0107 test McNemara w R - Statology\" \/>\n<meta property=\"og:description\" content=\"Proste wyja\u015bnienie sposobu wykonania testu McNemara w R, wraz z przyk\u0142adem krok po kroku.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/test-mcnemarsa-r\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-29T03:25:22+00:00\" \/>\n<meta name=\"author\" content=\"Benjamin Anderson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Napisane przez\" \/>\n\t<meta name=\"twitter:data1\" content=\"Benjamin Anderson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Szacowany czas czytania\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minuty\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pl\/test-mcnemarsa-r\/\",\"url\":\"https:\/\/statorials.org\/pl\/test-mcnemarsa-r\/\",\"name\":\"Jak wykona\u0107 test McNemara w R - Statology\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-29T03:25:22+00:00\",\"dateModified\":\"2023-07-29T03:25:22+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"Proste wyja\u015bnienie sposobu wykonania testu McNemara w R, wraz z przyk\u0142adem krok po kroku.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/test-mcnemarsa-r\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/test-mcnemarsa-r\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/test-mcnemarsa-r\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Jak wykona\u0107 test mcnemara w r\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/statorials.org\/pl\/#website\",\"url\":\"https:\/\/statorials.org\/pl\/\",\"name\":\"Statorials\",\"description\":\"Tw\u00f3j przewodnik po kompetencjach statystycznych!\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/statorials.org\/pl\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pl-PL\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\",\"name\":\"Benjamin Anderson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pl-PL\",\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/statorials.org\/pl\/wp-content\/uploads\/2023\/11\/Benjamin-Anderson-96x96.jpg\",\"contentUrl\":\"https:\/\/statorials.org\/pl\/wp-content\/uploads\/2023\/11\/Benjamin-Anderson-96x96.jpg\",\"caption\":\"Benjamin Anderson\"},\"description\":\"Cze\u015b\u0107, jestem Benjamin i jestem emerytowanym profesorem statystyki, kt\u00f3ry zosta\u0142 oddanym nauczycielem Statorials. 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