{"id":5839,"date":"2025-07-15T13:34:45","date_gmt":"2025-07-15T13:34:45","guid":{"rendered":"https:\/\/functiontranslator.com\/t-dist-2t\/"},"modified":"2021-02-26T10:04:29","modified_gmt":"2021-02-26T10:04:29","slug":"t-dist-2t","status":"publish","type":"post","link":"https:\/\/functiontranslator.com\/cs\/t-dist-2t\/","title":{"rendered":"T.DIST.2T"},"content":{"rendered":"<h2>\u00davod<\/h2>\n<p>Funkce <code>T.DIST.2T<\/code> v Excelu a Google Sheets slou\u017e\u00ed k v\u00fdpo\u010dtu dvoustrann\u00e9 pravd\u011bpodobnosti pro Studentovo t-rozd\u011blen\u00ed. Tato funkce je u\u017eite\u010dn\u00e1 pro ur\u010den\u00ed pravd\u011bpodobnosti, \u017ee hodnota t-rozd\u011blen\u00e9 prom\u011bnn\u00e9 s dan\u00fdm po\u010dtem stup\u0148\u016f volnosti p\u0159ekro\u010d\u00ed absolutn\u00ed hodnotu zadan\u00e9 t-statistiky.<\/p>\n<h2>Syntaxe a p\u0159\u00edklady<\/h2>\n<p>Syntaxe funkce <code>T.DIST.2T<\/code> je n\u00e1sleduj\u00edc\u00ed:<\/p>\n<pre><code>T.DIST.2T(x, stupe\u0148_volnosti)<\/code><\/pre>\n<ul>\n<li><code>x<\/code> je hodnota t-statistiky, pro kterou se vypo\u010d\u00edt\u00e1v\u00e1 pravd\u011bpodobnost.<\/li>\n<li><code>stupe\u0148_volnosti<\/code> ud\u00e1v\u00e1 po\u010det stup\u0148\u016f volnosti t-rozd\u011blen\u00ed.<\/li>\n<\/ul>\n<p>P\u0159\u00edklad pou\u017eit\u00ed funkce:<\/p>\n<p>Pro v\u00fdpo\u010det dvoustrann\u00e9 pravd\u011bpodobnosti t-statistiky 2.5 se 10 stupni volnosti pou\u017eijte n\u00e1sleduj\u00edc\u00ed vzorec:<\/p>\n<pre><code>=T.DIST.2T(2.5, 10)<\/code><\/pre>\n<p>Tento p\u0159\u00edklad vr\u00e1t\u00ed pravd\u011bpodobnost, \u017ee absolutn\u00ed hodnota n\u00e1hodn\u00e9 prom\u011bnn\u00e9 t s 10 stupni volnosti p\u0159es\u00e1hne 2.5.<\/p>\n<h2>Aplikace ve skute\u010dn\u00fdch situac\u00edch<\/h2>\n<h2>Situa\u010dn\u00ed anal\u00fdza 1: Porovn\u00e1n\u00ed pr\u016fm\u011br\u016f<\/h2>\n<p>P\u0159i porovn\u00e1n\u00ed pr\u016fm\u011br\u016f dvou vzork\u016f s r\u016fzn\u00fdmi velikostmi a nezn\u00e1mou shodou variance m\u016f\u017eeme pou\u017e\u00edt nez\u00e1visl\u00fd t-test, kter\u00fd vyu\u017e\u00edv\u00e1 t-statistiky. K z\u00edsk\u00e1n\u00ed pravd\u011bpodobnosti t-testu n\u00e1m pom\u016f\u017ee funkce <code>T.DIST.2T<\/code>.<\/p>\n<pre><code>Stupe\u0148 volnosti = (n1 + n2) - 2 T-statistika = (x1 - x2) \/ SE<\/code><\/pre>\n<ul>\n<li><code>n1<\/code>, <code>n2<\/code> jsou velikosti vzork\u016f<\/li>\n<li><code>x1<\/code>, <code>x2<\/code> jsou pr\u016fm\u011bry vzork\u016f<\/li>\n<li><code>SE<\/code> je standardn\u00ed chyba rozd\u00edlu pr\u016fm\u011br\u016f<\/li>\n<\/ul>\n<p>P\u0159\u00edklad:<\/p>\n<pre><code>=T.DIST.2T(3.2, 28)<\/code><\/pre>\n<p>Dosazen\u00ed do vzorce uk\u00e1\u017ee pravd\u011bpodobnost, \u017ee rozd\u00edl mezi dv\u011bma pr\u016fm\u011bry p\u0159esahuje hodnotu t-statistiky 3.2 p\u0159i 28 stupn\u00edch volnosti.<\/p>\n<h2>Situa\u010dn\u00ed anal\u00fdza 2: Testov\u00e1n\u00ed hypot\u00e9z<\/h2>\n<p>Funkce <code>T.DIST.2T<\/code> m\u016f\u017ee b\u00fdt rovn\u011b\u017e pou\u017e\u00edv\u00e1na pro testov\u00e1n\u00ed hypot\u00e9z o st\u0159edn\u00ed hodnot\u011b populace na z\u00e1klad\u011b vzorku, kdy\u017e nezn\u00e1me standardn\u00ed odchylku populace.<\/p>\n<pre><code>Hlavn\u00ed hypot\u00e9za: \u00b5 = \u00b50 T-statistika = (X - \u00b50) \/ (S\/sqrt(n))<\/code><\/pre>\n<ul>\n<li><code>X<\/code> je pr\u016fm\u011brn\u00e1 hodnota vzorku<\/li>\n<li><code>\u00b50<\/code> je hypotetick\u00e1 st\u0159edn\u00ed hodnota populace<\/li>\n<li><code>S<\/code> je standardn\u00ed odchylka vzorku<\/li>\n<li><code>n<\/code> je velikost vzorku<\/li>\n<\/ul>\n<p>P\u0159\u00edklad:<\/p>\n<pre><code>=T.DIST.2T(1.96, 15)<\/code><\/pre>\n<p>Tato funkce poskytne pravd\u011bpodobnost, \u017ee skute\u010dn\u00fd rozd\u00edl st\u0159edn\u00edch hodnot p\u0159esahuje t-statistiku 1.96, se 15 stupni volnosti.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Vr\u00e1t\u00ed procentu\u00e1ln\u00ed body (pravd\u011bpodobnost) pro distribu\u010dn\u00ed funkci Studentova t-rozd\u011blen\u00ed<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[287],"tags":[],"class_list":["post-5839","post","type-post","status-publish","format-standard","hentry","category-statisticke"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Funkce T.DIST.2T v Excelu: jak funguje, primjeri kori\u0161tenja formule<\/title>\n<meta name=\"description\" content=\"Opis funkcije T.DIST.2T u Excelu i Google tablicama. 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