{"id":2662,"date":"2023-07-21T06:56:19","date_gmt":"2023-07-21T06:56:19","guid":{"rendered":"https:\/\/statorials.org\/pl\/test-kpss-w-pythonie\/"},"modified":"2023-07-21T06:56:19","modified_gmt":"2023-07-21T06:56:19","slug":"test-kpss-w-pythonie","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/test-kpss-w-pythonie\/","title":{"rendered":"Jak wykona\u0107 test kpss w pythonie"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\"><strong>Test KPSS<\/strong> mo\u017cna zastosowa\u0107 do ustalenia, czy szereg czasowy ma trend stacjonarny.<\/span><\/p>\n<p> <span style=\"color: #000000;\">W te\u015bcie tym wykorzystuje si\u0119 nast\u0119puj\u0105c\u0105 hipotez\u0119 zerow\u0105 i alternatywn\u0105:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>H <sub>0<\/sub><\/strong> : Szereg czasowy ma trend stacjonarny.<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>H <sub>A<\/sub><\/strong> : Szereg czasowy <em>nie ma<\/em> trendu stacjonarnego.<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Je\u017celi <a href=\"https:\/\/statorials.org\/pl\/p-oznacza-istotnosc-statystyczna\/\" target=\"_blank\" rel=\"noopener\">warto\u015b\u0107 p<\/a> testu jest poni\u017cej pewnego poziomu istotno\u015bci (np. \u03b1 = 0,05), w\u00f3wczas odrzucamy hipotez\u0119 zerow\u0105 i stwierdzamy, \u017ce szereg czasowy nie ma tendencji stacjonarnej.<\/span><\/p>\n<p> <span style=\"color: #000000;\">W przeciwnym razie nie uda nam si\u0119 odrzuci\u0107 hipotezy zerowej.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Poni\u017csze przyk\u0142ady pokazuj\u0105, jak wykona\u0107 test KPSS w Pythonie.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 1: Test KPSS w Pythonie (z danymi stacjonarnymi)<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Najpierw utw\u00f3rzmy fa\u0142szywe dane w Pythonie, z kt\u00f3rymi b\u0119dziemy mogli pracowa\u0107:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008000;\">import<\/span> numpy <span style=\"color: #008000;\">as<\/span> np<\/span>\n<span style=\"color: #000000;\"><span style=\"color: #008000;\">import<\/span> matplotlib. <span style=\"color: #3366ff;\">pyplot<\/span> <span style=\"color: #008000;\">as<\/span> plt\n\n<span style=\"color: #008080;\">#make this example reproducible\n<\/span>n.p. <span style=\"color: #3366ff;\">random<\/span> . <span style=\"color: #3366ff;\">seed<\/span> ( <span style=\"color: #008000;\">1<\/span> )\n\n<span style=\"color: #008080;\">#create time series data\n<\/span>data = np. <span style=\"color: #3366ff;\">random<\/span> . <span style=\"color: #3366ff;\">normal<\/span> (size= <span style=\"color: #008000;\">100<\/span> )\n\n<span style=\"color: #008080;\">#create line plot of time series data\n<\/span>plt. <span style=\"color: #3366ff;\">plot<\/span> (data)<\/span><\/span><\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-23462 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/kpss3.jpg\" alt=\"\" width=\"524\" height=\"351\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Mo\u017cemy u\u017cy\u0107 funkcji <strong>kpss()<\/strong> z pakietu <b>statsmodels<\/b> , aby przeprowadzi\u0107 test KPSS na danych szereg\u00f3w czasowych:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008000;\">import<\/span> statsmodels. <span style=\"color: #3366ff;\">api<\/span> <span style=\"color: #008000;\">as<\/span> sm\n\n<span style=\"color: #008080;\">#perform KPSS test\n<\/span>sm. <span style=\"color: #3366ff;\">tsa<\/span> . <span style=\"color: #3366ff;\">stattools<\/span> . <span style=\"color: #3366ff;\">kpss<\/span> (data, regression=' <span style=\"color: #ff0000;\">ct<\/span> ')\n\n(0.0477617848370993,\n 0.1,\n 1,\n {'10%': 0.119, '5%': 0.146, '2.5%': 0.176, '1%': 0.216})\n\nInterpolationWarning: The test statistic is outside of the range of p-values available\nin the look-up table. The actual p-value is greater than the p-value returned.\n<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\">Oto jak zinterpretowa\u0107 wynik:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">Statystyka testu KPSS: <strong>0,04776<\/strong><\/span><\/li>\n<li> <span style=\"color: #000000;\">Warto\u015b\u0107 p: <strong>0,1<\/strong><\/span><\/li>\n<li> <span style=\"color: #000000;\">Parametr przesuni\u0119cia obci\u0119cia: <strong>1<\/strong><\/span><\/li>\n<li> <span style=\"color: #000000;\">Warto\u015bci krytyczne przy <strong>10%<\/strong> , <strong>5%<\/strong> , <strong>2,5%<\/strong> i <strong>1%<\/strong><\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Warto\u015b\u0107 p wynosi <strong>0,1<\/strong> . Poniewa\u017c warto\u015b\u0107 ta jest nie mniejsza ni\u017c 0,05, nie mo\u017cna odrzuci\u0107 hipotezy zerowej testu KPSS.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Oznacza to, \u017ce mo\u017cemy za\u0142o\u017cy\u0107, \u017ce szereg czasowy ma trend stacjonarny.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Uwaga 1<\/strong> : Warto\u015b\u0107 p jest w rzeczywisto\u015bci nadal wi\u0119ksza ni\u017c 0,1, ale najni\u017csza warto\u015b\u0107, jak\u0105 wygeneruje funkcja kpss() to 0,1.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Uwaga 2<\/strong> : Nale\u017cy u\u017cy\u0107 argumentu <strong>regression=&#8217;ct&#8217;<\/strong> , aby okre\u015bli\u0107, \u017ce hipoteza zerowa testu zak\u0142ada, \u017ce dane maj\u0105 trend stacjonarny.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 2: Test KPSS w Pythonie (z danymi niestacjonarnymi)<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Najpierw utw\u00f3rzmy fa\u0142szywe dane w Pythonie, z kt\u00f3rymi b\u0119dziemy mogli pracowa\u0107:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008000;\">import<\/span> numpy <span style=\"color: #008000;\">as<\/span> np<\/span>\n<span style=\"color: #000000;\"><span style=\"color: #008000;\">import<\/span> matplotlib. <span style=\"color: #3366ff;\">pyplot<\/span> <span style=\"color: #008000;\">as<\/span> plt\n\n<span style=\"color: #008080;\">#make this example reproducible\n<\/span>n.p. <span style=\"color: #3366ff;\">random<\/span> . <span style=\"color: #3366ff;\">seed<\/span> ( <span style=\"color: #008000;\">1<\/span> )\n\n<span style=\"color: #008080;\">#create time series data\n<\/span>data =np. <span style=\"color: #3366ff;\">array<\/span> ([0, 3, 4, 3, 6, 7, 5, 8, 15, 13, 19, 12, 29, 15, 45, 23, 67, 45])\n\n<span style=\"color: #008080;\">#create line plot of time series data\n<\/span>plt. <span style=\"color: #3366ff;\">plot<\/span> (data)<\/span><\/span><\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-23463 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/kpss4.jpg\" alt=\"\" width=\"525\" height=\"350\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Ponownie mo\u017cemy u\u017cy\u0107 funkcji <strong>kpss()<\/strong> z pakietu <b>statsmodels<\/b> , aby przeprowadzi\u0107 test KPSS na danych szereg\u00f3w czasowych:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008000;\">import<\/span> statsmodels. <span style=\"color: #3366ff;\">api<\/span> <span style=\"color: #008000;\">as<\/span> sm\n\n<span style=\"color: #008080;\">#perform KPSS test\n<\/span>sm. <span style=\"color: #3366ff;\">tsa<\/span> . <span style=\"color: #3366ff;\">stattools<\/span> . <span style=\"color: #3366ff;\">kpss<\/span> (data, regression=' <span style=\"color: #ff0000;\">ct<\/span> ')\n\n(0.15096358910843685,\n 0.04586367574296928,\n 3,\n {'10%': 0.119, '5%': 0.146, '2.5%': 0.176, '1%': 0.216})\n<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\">Oto jak zinterpretowa\u0107 wynik:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">Statystyka testu KPSS: <strong>0,1509<\/strong><\/span><\/li>\n<li> <span style=\"color: #000000;\">Warto\u015b\u0107 p: <strong>0,0458<\/strong><\/span><\/li>\n<li> <span style=\"color: #000000;\">Parametr przesuni\u0119cia obci\u0119cia: <strong>3<\/strong><\/span><\/li>\n<li> <span style=\"color: #000000;\">Warto\u015bci krytyczne przy <strong>10%<\/strong> , <strong>5%<\/strong> , <strong>2,5%<\/strong> i <strong>1%<\/strong><\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Warto\u015b\u0107 p wynosi <strong>0,0458<\/strong> . Warto\u015b\u0107 ta jest mniejsza ni\u017c 0,05, wi\u0119c odrzucamy hipotez\u0119 zerow\u0105 testu KPSS.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Oznacza to, \u017ce szereg czasowy <em>nie jest<\/em> stacjonarny.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Uwaga<\/strong> : Pe\u0142n\u0105 dokumentacj\u0119 funkcji kpss() mo\u017cna znale\u017a\u0107 w pakiecie statsmodels <a href=\"https:\/\/www.statsmodels.org\/stable\/generated\/statsmodels.tsa.stattools.kpss.html\" target=\"_blank\" rel=\"noopener\">tutaj<\/a> .<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Dodatkowe zasoby<\/strong><\/span><span style=\"color: #000000;\"><br \/><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Poni\u017csze samouczki zawieraj\u0105 dodatkowe informacje na temat pracy z danymi szereg\u00f3w czasowych w j\u0119zyku Python:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pl\/dickey-fuller-testuje-pythona\/\" target=\"_blank\" rel=\"noopener\">Jak wykona\u0107 rozszerzony test Dickeya-Fullera w Pythonie<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/man-kendall-testuje-pythona\/\" target=\"_blank\" rel=\"noopener\">Jak wykona\u0107 test trendu Manna-Kendalla w Pythonie<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/szereg-czasowy-matplotlib\/\" target=\"_blank\" rel=\"noopener\">Jak wykre\u015bli\u0107 szereg czasowy w Matplotlib<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Test KPSS mo\u017cna zastosowa\u0107 do ustalenia, czy szereg czasowy ma trend stacjonarny. W te\u015bcie tym wykorzystuje si\u0119 nast\u0119puj\u0105c\u0105 hipotez\u0119 zerow\u0105 i alternatywn\u0105: H 0 : Szereg czasowy ma trend stacjonarny. H A : Szereg czasowy nie ma trendu stacjonarnego. Je\u017celi warto\u015b\u0107 p testu jest poni\u017cej pewnego poziomu istotno\u015bci (np. \u03b1 = 0,05), w\u00f3wczas odrzucamy hipotez\u0119 [&hellip;]<\/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-2662","post","type-post","status-publish","format-standard","hentry","category-przewodnik"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Jak wykona\u0107 test KPSS w Pythonie - Statologia<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, jak wykona\u0107 test KPSS w j\u0119zyku Python, podaj\u0105c kilka przyk\u0142ad\u00f3w.\" \/>\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-kpss-w-pythonie\/\" \/>\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 KPSS w Pythonie - Statologia\" \/>\n<meta property=\"og:description\" content=\"W tym samouczku wyja\u015bniono, jak wykona\u0107 test KPSS w j\u0119zyku Python, podaj\u0105c kilka przyk\u0142ad\u00f3w.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/test-kpss-w-pythonie\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-21T06:56:19+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/kpss3.jpg\" \/>\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=\"3 minuty\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pl\/test-kpss-w-pythonie\/\",\"url\":\"https:\/\/statorials.org\/pl\/test-kpss-w-pythonie\/\",\"name\":\"Jak wykona\u0107 test KPSS w Pythonie - Statologia\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-21T06:56:19+00:00\",\"dateModified\":\"2023-07-21T06:56:19+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"W tym samouczku wyja\u015bniono, jak wykona\u0107 test KPSS w j\u0119zyku Python, podaj\u0105c kilka przyk\u0142ad\u00f3w.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/test-kpss-w-pythonie\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/test-kpss-w-pythonie\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/test-kpss-w-pythonie\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Jak wykona\u0107 test kpss w pythonie\"}]},{\"@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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