{"id":5857,"date":"2025-07-15T13:34:45","date_gmt":"2025-07-15T13:34:45","guid":{"rendered":"https:\/\/functiontranslator.com\/ttest\/"},"modified":"2021-02-26T10:05:12","modified_gmt":"2021-02-26T10:05:12","slug":"ttest","status":"publish","type":"post","link":"https:\/\/functiontranslator.com\/cs\/ttest\/","title":{"rendered":"TTEST"},"content":{"rendered":"<h2>Princip a syntaxe dvouv\u00fdb\u011brov\u00e9ho t-testu<\/h2>\n<p>Dvouv\u00fdb\u011brov\u00fd t-test je statistick\u00e1 funkce, kter\u00e1 se pou\u017e\u00edv\u00e1 k porovn\u00e1n\u00ed dvou nez\u00e1visl\u00fdch skupin dat a ur\u010den\u00ed, zda jsou jejich pr\u016fm\u011bry statisticky odli\u0161n\u00e9. Tento test m\u016f\u017ee b\u00fdt aplikov\u00e1n ve dvou variant\u00e1ch: jako test pro data s p\u0159edpokladem rovnosti rozptyl\u016f (tzv. homoskedasticita) a data bez tohoto p\u0159edpokladu (heteroskedasticita).<\/p>\n<p>Funkce v Excelu je dostupn\u00e1 pod jm\u00e9nem <code>TTEST<\/code>, zat\u00edmco v Google Tabulk\u00e1ch naleznete obdobu pod jm\u00e9nem <code>T.TEST<\/code>. <\/p>\n<pre> Syntaxe v MS Excel: <code>TTEST(array1, array2, tails, type)<\/code> Syntaxe v Google Tabulk\u00e1ch: <code>T.TEST(array1, array2, tails, type)<\/code> <\/pre>\n<h2>Syntaxe podrobn\u011b<\/h2>\n<ul>\n<li><code>array1<\/code> a <code>array2<\/code>: Dva datov\u00e9 soubory obsahuj\u00edc\u00ed hodnoty, kter\u00e9 chceme statisticky porovnat.<\/li>\n<li><code>tails<\/code>: Specifikuje, zda bude test jednostrann\u00fd (1) nebo oboustrann\u00fd (2).<\/li>\n<li><code>type<\/code>: Typ testu t, kde:\n<ul>\n<li>1 je test p\u0159i p\u0159edpokladu rovnosti rozptyl\u016f,<\/li>\n<li>2 je test bez p\u0159edpokladu rovnosti rozptyl\u016f,<\/li>\n<li>3 je test pro sp\u00e1rovan\u00e9 vzorky.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>P\u0159\u00edklady pou\u017eit\u00ed<\/h2>\n<p>Pro ilustraci si p\u0159edstavme, \u017ee m\u00e1me dv\u011b skupiny dat, kter\u00e9 reprezentuj\u00ed v\u00fdsledky test\u016f dvou r\u016fzn\u00fdch t\u0159\u00edd. Chceme zjistit, zda existuje statisticky v\u00fdznamn\u00fd rozd\u00edl mezi t\u011bmito dv\u011bma skupinami.<\/p>\n<p> <b>P\u0159\u00edpad 1: Test pro nez\u00e1visl\u00e9 vzorky s p\u0159edpokladem rovnosti rozptyl\u016f<\/b> <\/p>\n<pre> Prvn\u00ed skupina (array1): 81, 85, 78, 90, 88 Druh\u00e1 skupina (array2): 75, 80, 78, 77, 74 V Excelu pou\u017eijeme: <code>=TTEST(A1:A5, B1:B5, 2, 1)<\/code> V Google Tabulk\u00e1ch: <code>=T.TEST(A1:A5, B1:B5, 2, 1)<\/code> Tento p\u0159\u00edkaz provede oboustrann\u00fd test s p\u0159edpokladem rovnosti rozptyl\u016f. <\/pre>\n<p> <b>P\u0159\u00edpad 2: Test pro nez\u00e1visl\u00e9 vzorky bez p\u0159edpokladu rovnosti rozptyl\u016f<\/b> <\/p>\n<pre> Prvn\u00ed skupina (array1): 81, 85, 78, 90, 88 Druh\u00e1 skupina (array2): 82, 86, 75, 88, 85 V Excelu pou\u017eijeme: <code>=TTEST(A1:A5, B1:B5, 2, 2)<\/code> V Google Tabulk\u00e1ch: <code>=T.TEST(A1:A5, B1:B5, 2, 2)<\/code> Tento p\u0159\u00edkaz provede oboustrann\u00fd test bez p\u0159edpokladu rovnosti rozptyl\u016f. <\/pre>\n<h2>Vyvozen\u00ed z\u00e1v\u011bru z v\u00fdsledk\u016f<\/h2>\n<p>Hodnota, kterou funkce vr\u00e1t\u00ed, reprezentuje p-hodnotu. Jestli\u017ee je tato hodnota men\u0161\u00ed ne\u017e zvolen\u00e1 hladina statistick\u00e9 v\u00fdznamnosti (\u010dasto 0.05), pak mezi skupinami existuje statisticky v\u00fdznamn\u00fd rozd\u00edl. Pokud je hodnota vy\u0161\u0161\u00ed, rozd\u00edly mezi skupinami jsou pova\u017eov\u00e1ny za n\u00e1hodn\u00e9.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Vr\u00e1t\u00ed pravd\u011bpodobnost spojenou se Studentov\u00fdm t-testem<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[289],"tags":[],"class_list":["post-5857","post","type-post","status-publish","format-standard","hentry","category-kompatibilita"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Funkce TTEST v Excelu: jak funguje, primjeri kori\u0161tenja formule<\/title>\n<meta name=\"description\" content=\"Opis funkcije TTEST u Excelu i Google tablicama. 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