{"id":862,"date":"2023-07-28T12:33:00","date_gmt":"2023-07-28T12:33:00","guid":{"rendered":"https:\/\/statorials.org\/id\/f-uji-python\/"},"modified":"2023-07-28T12:33:00","modified_gmt":"2023-07-28T12:33:00","slug":"f-uji-python","status":"publish","type":"post","link":"https:\/\/statorials.org\/id\/f-uji-python\/","title":{"rendered":"Cara melakukan tes f dengan python"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\"><strong>Uji F<\/strong> digunakan untuk menguji apakah dua varian populasi sama. Hipotesis nol dan alternatif dari pengujian tersebut adalah sebagai berikut:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>H <sub>0<\/sub> :<\/strong> \u03c3 <sub>1<\/sub> <sup>2<\/sup> = \u03c3 <sub>2<\/sub> <sup>2<\/sup> (varians populasi sama)<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>H <sub>1<\/sub> :<\/strong> \u03c3 <sub>1<\/sub> <sup>2<\/sup> \u2260 \u03c3 <sub>2<\/sub> <sup>2<\/sup> (varians populasi <em>tidak<\/em> sama)<\/span><\/p>\n<p> <span style=\"color: #000000;\">Tutorial ini menjelaskan cara melakukan tes F dengan Python.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Contoh: Uji-F dengan Python<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Misalkan kita mempunyai dua contoh berikut:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>x = [18, 19, 22, 25, 27, 28, 41, 45, 51, 55]<\/strong>\n<strong>y = [14, 15, 15, 17, 18, 22, 25, 25, 27, 34]<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Kita dapat menggunakan fungsi berikut untuk melakukan uji F guna menentukan apakah kedua populasi asal sampel ini memiliki varian yang sama:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #107d3f;\">import<\/span> numpy <span style=\"color: #107d3f;\">as<\/span> np\n\n<span style=\"color: #008080;\">#define F-test function<\/span>\n<span style=\"color: #008000;\">def<\/span> f_test(x, y):\n    x = np.array(x)\n    y = np.array(y)\n    f = np.var(x, ddof=1)\/np.var(y, ddof=1) <span style=\"color: #008080;\">#calculate F test statistic<\/span>\n    dfn = x.size-1 <span style=\"color: #008080;\">#define degrees of freedom numerator<\/span>\n    dfd = y.size-1 <span style=\"color: #008080;\">#define degrees of freedom denominator<\/span>\n    p = 1-scipy.stats.f.cdf(f, dfn, dfd) <span style=\"color: #008080;\">#find p-value of F test statistic<\/span>\n    <span style=\"color: #008000;\">return<\/span> f,p\n\n<span style=\"color: #008080;\">#perform F-test\n<\/span>f_test(x, y)\n\n(4.38712, 0.019127)\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Statistik uji F adalah <strong>4,38712<\/strong> dan nilai p yang sesuai adalah <strong>0,019127<\/strong> . Karena nilai p ini kurang dari 0,05, kami menolak hipotesis nol. Artinya kita mempunyai cukup bukti untuk mengatakan bahwa kedua varian populasi tersebut <em>tidak<\/em> sama.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Komentar<\/strong><\/span><\/h3>\n<ul>\n<li> <span style=\"color: #000000;\">Statistik uji F dihitung sebagai s <sub>1<\/sub> <sup>2<\/sup> \/ s <sub>2<\/sub> <sup>2<\/sup> . Secara default, <a href=\"https:\/\/numpy.org\/doc\/stable\/reference\/generated\/numpy.var.html#:~:text=Compute%20the%20variance%20along%20the,the%20spread%20of%20a%20distribution.\" target=\"_blank\" rel=\"noopener noreferrer\">numpy.var<\/a> menghitung varians populasi. Untuk menghitung varians sampel, kita perlu menentukan <strong>ddof=1<\/strong> .<\/span><\/li>\n<li> <span style=\"color: #000000;\">Nilai p sesuai dengan 1 \u2013 cdf dari distribusi F dengan derajat kebebasan pada pembilang = n <sub>1<\/sub> -1 dan derajat kebebasan pada penyebut = n <sub>2<\/sub> -1.<\/span><\/li>\n<li> <span style=\"color: #000000;\">Fungsi ini hanya berfungsi bila varians sampel pertama lebih besar daripada varians sampel kedua. Jadi atur kedua contoh agar berfungsi dengan fungsi tersebut.<\/span><\/li>\n<\/ul>\n<h3> <span style=\"color: #000000;\"><strong>Kapan menggunakan uji F<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Uji-F biasanya digunakan untuk menjawab salah satu pertanyaan berikut:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>1.<\/strong> Apakah dua sampel berasal dari populasi yang variansinya sama?<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>2. Apakah<\/strong> perlakuan atau proses baru mengurangi variabilitas perlakuan atau proses saat ini?<\/span><\/p>\n<p> <span style=\"color: #000000;\"><b>Terkait:<\/b> <a href=\"https:\/\/statorials.org\/id\/tes-f-di-r\/\" target=\"_blank\" rel=\"noopener noreferrer\">Cara melakukan tes F di R<\/a><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Uji F digunakan untuk menguji apakah dua varian populasi sama. Hipotesis nol dan alternatif dari pengujian tersebut adalah sebagai berikut: H 0 : \u03c3 1 2 = \u03c3 2 2 (varians populasi sama) H 1 : \u03c3 1 2 \u2260 \u03c3 2 2 (varians populasi tidak sama) Tutorial ini menjelaskan cara melakukan tes F dengan [&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":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Cara melakukan tes F dengan Python - Statorials<\/title>\n<meta name=\"description\" content=\"Tutorial ini menjelaskan cara melakukan uji F untuk varian yang sama dengan Python.\" \/>\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\/id\/f-uji-python\/\" \/>\n<meta property=\"og:locale\" content=\"id_ID\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cara melakukan tes F dengan Python - Statorials\" \/>\n<meta property=\"og:description\" content=\"Tutorial ini menjelaskan cara melakukan uji F untuk varian yang sama dengan Python.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/id\/f-uji-python\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-28T12:33:00+00:00\" \/>\n<meta name=\"author\" content=\"Benjamin anderson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Ditulis oleh\" \/>\n\t<meta name=\"twitter:data1\" content=\"Benjamin anderson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimasi waktu membaca\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 menit\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/id\/f-uji-python\/\",\"url\":\"https:\/\/statorials.org\/id\/f-uji-python\/\",\"name\":\"Cara melakukan tes F dengan Python - Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/id\/#website\"},\"datePublished\":\"2023-07-28T12:33:00+00:00\",\"dateModified\":\"2023-07-28T12:33:00+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/id\/#\/schema\/person\/3d17a1160dd2d052b7c78e502cb9ec81\"},\"description\":\"Tutorial ini menjelaskan cara melakukan uji F untuk varian yang sama dengan Python.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/id\/f-uji-python\/#breadcrumb\"},\"inLanguage\":\"id\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/id\/f-uji-python\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/id\/f-uji-python\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/statorials.org\/id\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Cara melakukan tes f dengan python\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/statorials.org\/id\/#website\",\"url\":\"https:\/\/statorials.org\/id\/\",\"name\":\"Statorials\",\"description\":\"Panduan anda untuk kompetensi statistik!\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/statorials.org\/id\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"id\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/statorials.org\/id\/#\/schema\/person\/3d17a1160dd2d052b7c78e502cb9ec81\",\"name\":\"Benjamin anderson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"id\",\"@id\":\"https:\/\/statorials.org\/id\/#\/schema\/person\/image\/\",\"url\":\"http:\/\/statorials.org\/id\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"contentUrl\":\"http:\/\/statorials.org\/id\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"caption\":\"Benjamin anderson\"},\"description\":\"Halo, saya Benjamin, pensiunan profesor statistika yang menjadi guru Statorial yang berdedikasi. 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