{"id":1131,"date":"2023-07-27T13:46:28","date_gmt":"2023-07-27T13:46:28","guid":{"rendered":"https:\/\/statorials.org\/id\/tes-welch-t-di-r\/"},"modified":"2023-07-27T13:46:28","modified_gmt":"2023-07-27T13:46:28","slug":"tes-welch-t-di-r","status":"publish","type":"post","link":"https:\/\/statorials.org\/id\/tes-welch-t-di-r\/","title":{"rendered":"Bagaimana melakukan uji-t welch di r"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\"><a href=\"https:\/\/statorials.org\/id\/tes-selamat-datang\/\" target=\"_blank\" rel=\"noopener\">Uji-t Welch<\/a> digunakan untuk membandingkan mean antara dua kelompok independen jika kedua kelompok <em>tidak<\/em> diasumsikan memiliki varian yang sama.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Untuk melakukan uji-t Welch di R, kita dapat menggunakan fungsi <strong>t.test()<\/strong> , yang menggunakan sintaks berikut:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>t.test(x, y, alternatif = c(\u201cdua muka\u201d, \u201ckurang\u201d, \u201clebih besar\u201d))<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">Emas:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>x :<\/strong> vektor numerik dari nilai data untuk kelompok pertama<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>y :<\/strong> vektor numerik dari nilai data untuk kelompok kedua<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>alternatif:<\/strong> hipotesis alternatif untuk pengujian. Standarnya adalah dua sisi.<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Contoh berikut menunjukkan cara menggunakan fungsi ini untuk melakukan uji-t Welch di R.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Contoh: Uji-t Welch di R<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Seorang guru ingin membandingkan hasil ujian dari 12 siswa yang menggunakan buku persiapan ujian untuk mempersiapkan ujian versus 12 siswa yang tidak.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Berikut vektor yang menunjukkan hasil ujian siswa pada masing-masing kelompok:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>booklet &lt;- c(90, 85, 88, 89, 94, 91, 79, 83, 87, 88, 91, 90)\nno_booklet &lt;- c(67, 90, 71, 95, 88, 83, 72, 66, 75, 86, 93, 84)\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Sebelum melakukan uji-t Welch, kita dapat membuat <a href=\"https:\/\/statorials.org\/id\/kumis-kotak\/\" target=\"_blank\" rel=\"noopener\">diagram kotak<\/a> terlebih dahulu untuk memvisualisasikan distribusi skor untuk setiap kelompok:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>boxplot(booklet, no_booklet, <span style=\"color: #3366ff;\">names<\/span> =c(\" <span style=\"color: #008000;\">Booklet<\/span> \",\" <span style=\"color: #008000;\">No Booklet<\/span> \"))\n<\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-11391 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/welchr1.png\" alt=\"Uji-t Welch di R\" width=\"386\" height=\"342\" srcset=\"\" sizes=\"\"><\/p>\n<p> <span style=\"color: #000000;\">Kita dapat melihat dengan jelas bahwa kelompok \u201cBuklet\u201d mempunyai skor rata-rata lebih tinggi dan varians skor lebih rendah.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Untuk menguji secara formal apakah skor rata-rata antar kelompok berbeda secara signifikan, kita dapat melakukan uji-t Welch:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#perform Welch's t-test<\/span>\nt.test(booklet, no_booklet)\n\n\tWelch Two Sample t-test\n\ndata: booklet and no_booklet\nt = 2.2361, df = 14.354, p-value = 0.04171\nalternative hypothesis: true difference in means is not equal to 0\n95 percent confidence interval:\n  0.3048395 13.8618272\nsample estimates:\nmean of x mean of y \n 87.91667 80.83333 \n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Dari hasilnya, kita dapat melihat bahwa statistik uji- <em>t<\/em> adalah <strong>2,2361<\/strong> dan nilai p yang sesuai adalah <strong>0,04171<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Karena nilai p ini kurang dari 0,05, kita dapat menolak hipotesis nol dan menyimpulkan bahwa terdapat perbedaan yang signifikan secara statistik dalam nilai rata-rata ujian antara kedua kelompok.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Fungsi <strong>t.test()<\/strong> juga memberi kita informasi berikut:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">Interval kepercayaan 95% untuk perbedaan nilai rata-rata ujian antara kedua kelompok adalah <strong>[0,3048, 13,8618<\/strong> ].<\/span><\/li>\n<li> <span style=\"color: #000000;\">Rata-rata nilai ujian kelompok pertama adalah <strong>87,91667<\/strong> .<\/span><\/li>\n<li> <span style=\"color: #000000;\">Rata-rata nilai ujian kelompok kedua adalah <strong>80,83333<\/strong> .<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\"><em>Anda dapat menemukan dokumentasi lengkap untuk fungsi t.test() <a href=\"https:\/\/www.rdocumentation.org\/packages\/stats\/versions\/3.6.2\/topics\/t.test\" target=\"_blank\" rel=\"noopener noreferrer\">di sini<\/a> .<\/em><\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Sumber daya tambahan<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Tutorial berikut menjelaskan cara melakukan tugas umum lainnya di R:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/id\/sampel-uji-t-di-r\/\" target=\"_blank\" rel=\"noopener\">Cara melakukan uji-t satu sampel di R<\/a><br \/> <a href=\"https:\/\/statorials.org\/id\/dua-sampel-uji-t-di-r\/\" target=\"_blank\" rel=\"noopener\">Cara melakukan uji-t dua sampel di R<\/a><br \/> <a href=\"https:\/\/statorials.org\/id\/uji-t-sampel-berpasangan-r\/\" target=\"_blank\" rel=\"noopener noreferrer\">Cara melakukan uji-t sampel berpasangan di R<\/a><br \/> <a href=\"https:\/\/statorials.org\/id\/beberapa-plot-kotak-r\/\" target=\"_blank\" rel=\"noopener noreferrer\">Cara memplot beberapa plot kotak dalam satu grafik di R<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Uji-t Welch digunakan untuk membandingkan mean antara dua kelompok independen jika kedua kelompok tidak diasumsikan memiliki varian yang sama. Untuk melakukan uji-t Welch di R, kita dapat menggunakan fungsi t.test() , yang menggunakan sintaks berikut: t.test(x, y, alternatif = c(\u201cdua muka\u201d, \u201ckurang\u201d, \u201clebih besar\u201d)) Emas: x : vektor numerik dari nilai data untuk kelompok pertama [&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 uji-t Welch di R - Statologi<\/title>\n<meta name=\"description\" content=\"Tutorial ini menjelaskan cara melakukan uji-t Welch di R, dengan sebuah contoh.\" \/>\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\/tes-welch-t-di-r\/\" \/>\n<meta property=\"og:locale\" content=\"id_ID\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cara melakukan uji-t Welch di R - Statologi\" \/>\n<meta property=\"og:description\" content=\"Tutorial ini menjelaskan cara melakukan uji-t Welch di R, dengan sebuah contoh.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/id\/tes-welch-t-di-r\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-27T13:46:28+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/welchr1.png\" \/>\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=\"2 menit\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/id\/tes-welch-t-di-r\/\",\"url\":\"https:\/\/statorials.org\/id\/tes-welch-t-di-r\/\",\"name\":\"Cara melakukan uji-t Welch di R - Statologi\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/id\/#website\"},\"datePublished\":\"2023-07-27T13:46:28+00:00\",\"dateModified\":\"2023-07-27T13:46:28+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/id\/#\/schema\/person\/3d17a1160dd2d052b7c78e502cb9ec81\"},\"description\":\"Tutorial ini menjelaskan cara melakukan uji-t Welch di R, dengan sebuah contoh.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/id\/tes-welch-t-di-r\/#breadcrumb\"},\"inLanguage\":\"id\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/id\/tes-welch-t-di-r\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/id\/tes-welch-t-di-r\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/statorials.org\/id\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Bagaimana melakukan uji-t welch di r\"}]},{\"@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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