{"id":2009,"date":"2023-07-24T02:50:02","date_gmt":"2023-07-24T02:50:02","guid":{"rendered":"https:\/\/statorials.org\/id\/perkiraan-titik-di-r\/"},"modified":"2023-07-24T02:50:02","modified_gmt":"2023-07-24T02:50:02","slug":"perkiraan-titik-di-r","status":"publish","type":"post","link":"https:\/\/statorials.org\/id\/perkiraan-titik-di-r\/","title":{"rendered":"Cara menghitung perkiraan poin di r (dengan contoh)"},"content":{"rendered":"

<\/p>\n

\n

Estimasi titik<\/a> mewakili angka yang kami hitung dari data sampel untuk memperkirakan parameter populasi. Ini adalah perkiraan terbaik kami mengenai parameter populasi sebenarnya.<\/span><\/p>\n

Tabel berikut menunjukkan estimasi titik yang kami gunakan untuk memperkirakan parameter populasi:<\/span><\/p>\n\n\n\n\n\n
Ukurannya<\/strong><\/span><\/th>\n Parameter populasi<\/strong><\/span><\/th>\n Perkiraan poin<\/strong><\/span><\/th>\n<\/tr>\n
Berarti<\/span><\/td>\n \u03bc (rata-rata populasi)<\/span><\/td>\n x<\/span> (rata-rata sampel)<\/span><\/td>\n<\/tr>\n
Proporsi<\/span><\/td>\n \u03c0 (proporsi populasi)<\/span><\/td>\n p (proporsi sampel)<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Contoh berikut menunjukkan cara menghitung estimasi titik untuk rata-rata populasi dan proporsi populasi di R.<\/span><\/p>\n

Contoh 1: Estimasi titik rata-rata populasi<\/strong><\/span><\/h3>\n

Katakanlah kita ingin memperkirakan tinggi rata-rata (dalam inci) suatu jenis tanaman tertentu di lahan tertentu. Kami mengumpulkan sampel acak sederhana dari 13 tanaman dan mengukur tinggi setiap tanaman.<\/span><\/p>\n

Kode berikut menunjukkan cara menghitung mean sampel:<\/span><\/p>\n

 #define data\n<\/span>data <- c(8, 8, 9, 12, 13, 13, 14, 15, 19, 22, 23, 23, 24)\n\n#calculate sample mean\n<\/span>mean(data, na. rm<\/span> = TRUE<\/span> )\n\n[1] 15.61538<\/strong><\/pre>\n
 Rata-rata sampel adalah 15,6<\/b> inci. Ini mewakili perkiraan titik kami mengenai rata-rata populasi.<\/span><\/p>\n
 Kita juga dapat menggunakan kode berikut untuk menghitung interval kepercayaan 95% untuk rata-rata populasi:<\/span><\/p>\n
 #find sample size, sample mean, and sample standard deviation\n<\/span>n <- length(data)\nxbar <- mean(data, na. rm<\/span> = TRUE<\/span> )\ns <- sd(data)\n\n#calculate margin of error\n<\/span>margin <- qt(0.975,df=n-1)*s\/sqrt(n)\n\n#calculate lower and upper bounds of confidence interval\n<\/span>low <- xbar - margin\nlow\n\n[1] 12.03575\n\nhigh <- xbar + margin\n<\/span>high\n\n[1] 19.19502\n\n<\/strong><\/pre>\n
 Interval kepercayaan 95% untuk rata-rata populasi adalah [12,0, 19,2]<\/strong> inci.<\/span><\/p>\n
 Contoh 2: Estimasi titik proporsi populasi<\/strong><\/span><\/h3>\n
 Misalkan kita ingin memperkirakan proporsi penduduk di suatu kota yang mendukung undang-undang tertentu. Kami mewawancarai sampel acak sederhana dari 20 warga.<\/span><\/p>\n
 Kode berikut menunjukkan cara menghitung proporsi sampel:<\/span><\/p>\n
 #define data\n<\/span>data <- c('Y', 'Y', 'Y', 'N', 'N', 'Y', 'Y', 'Y', 'N', 'Y',\n          'N', 'Y', 'Y', 'N', 'N', 'Y', 'Y', 'Y', 'N', 'N')\n\n#find total sample size\n<\/span>n <- length(data)\n\n#find number who responded 'Yes'\n<\/span>k <- sum(data == ' Y<\/span> ') \n\n#find sample proportion\n<\/span>p <- k\/n\n\np\n\n[1] 0.6\n<\/strong><\/pre>\n
 Proporsi sampel masyarakat yang mendukung hukum adalah 0,6<\/b> . Ini merupakan perkiraan utama kami mengenai proporsi populasi.<\/span><\/p>\n
 Kita juga dapat menggunakan kode berikut untuk menghitung interval kepercayaan 95% untuk rata-rata populasi:<\/span><\/p>\n
 #find total sample size\n<\/span>n <- length(data)\n\n#find number who responded 'Yes'\n<\/span>k <- sum(data == ' Y<\/span> ') \n\n#find sample proportion\n<\/span>p <- k\/n\n\n#calculate margin of error\n<\/span>margin <- qnorm(0.975)*sqrt(p*(1-p)\/n)\n\n#calculate lower and upper bounds of confidence interval\n<\/span>low <- p - margin\nlow\n\n[1] 0.3852967\n\nhigh <- p + margin\nhigh\n\n[1] 0.8147033\n<\/strong><\/pre>\n
 Interval kepercayaan 95% untuk proporsi populasi adalah [0.39, 0.81]<\/strong> .<\/span><\/p>\n
 Sumber daya tambahan<\/strong><\/span><\/h3>\n
 Cara menghitung rangkuman lima angka di R<\/a>
 Cara mencari interval kepercayaan pada R<\/a>
 Cara memplot interval kepercayaan di R<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
Estimasi titik mewakili angka yang kami hitung dari data sampel untuk memperkirakan parameter populasi. Ini adalah perkiraan terbaik kami mengenai parameter populasi sebenarnya. Tabel berikut menunjukkan estimasi titik yang kami gunakan untuk memperkirakan parameter populasi: Ukurannya Parameter populasi Perkiraan poin Berarti \u03bc (rata-rata populasi) x (rata-rata sampel) Proporsi \u03c0 (proporsi populasi) p (proporsi sampel) Contoh […]<\/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":"\nCara Menghitung Perkiraan Poin di R (dengan Contoh) - Statologi<\/title>\n<meta name=\"description\" content=\"Tutorial ini menjelaskan cara menghitung estimasi titik di R, dengan beberapa 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\/perkiraan-titik-di-r\/\" \/>\n<meta property=\"og:locale\" content=\"id_ID\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cara Menghitung Perkiraan Poin di R (dengan Contoh) - Statologi\" \/>\n<meta property=\"og:description\" content=\"Tutorial ini menjelaskan cara menghitung estimasi titik di R, dengan beberapa contoh.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/id\/perkiraan-titik-di-r\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-24T02:50:02+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=\"2 menit\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/id\/perkiraan-titik-di-r\/\",\"url\":\"https:\/\/statorials.org\/id\/perkiraan-titik-di-r\/\",\"name\":\"Cara Menghitung Perkiraan Poin di R (dengan Contoh) - Statologi\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/id\/#website\"},\"datePublished\":\"2023-07-24T02:50:02+00:00\",\"dateModified\":\"2023-07-24T02:50:02+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/id\/#\/schema\/person\/3d17a1160dd2d052b7c78e502cb9ec81\"},\"description\":\"Tutorial ini menjelaskan cara menghitung estimasi titik di R, dengan beberapa contoh.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/id\/perkiraan-titik-di-r\/#breadcrumb\"},\"inLanguage\":\"id\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/id\/perkiraan-titik-di-r\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/id\/perkiraan-titik-di-r\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/statorials.org\/id\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Cara menghitung perkiraan poin di r (dengan contoh)\"}]},{\"@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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