{"id":5481,"date":"2025-07-15T13:34:44","date_gmt":"2025-07-15T13:34:44","guid":{"rendered":"https:\/\/functiontranslator.com\/confidence\/"},"modified":"2021-02-26T09:51:54","modified_gmt":"2021-02-26T09:51:54","slug":"confidence","status":"publish","type":"post","link":"https:\/\/functiontranslator.com\/cs\/confidence\/","title":{"rendered":"CONFIDENCE"},"content":{"rendered":"<h2>Co to je a jak se pou\u017e\u00edv\u00e1 statistick\u00e1 funkce pro v\u00fdpo\u010det intervalu spolehlivosti<\/h2>\n<p>Ve sv\u011bt\u011b statistiky a datov\u00e9 anal\u00fdzy je \u010dasto pot\u0159eba odhadnout, jak p\u0159esn\u00e9 jsou v\u00fdsledky z\u00edskan\u00e9 z vzorku populace. Jednou z funkc\u00ed, kter\u00e1 v\u00e1m s t\u00edmto m\u016f\u017ee pomoci v aplikac\u00edch jako MS Excel a Google Tabulky, je funkce na v\u00fdpo\u010det intervalu spolehlivosti. Tato funkce poskytuje horn\u00ed mez intervalu spolehlivosti pro st\u0159edn\u00ed hodnotu statistick\u00e9 populace zalo\u017een\u00e9 na dan\u00e9m vzorku dat.<\/p>\n<h2>Syntaxe a pou\u017eit\u00ed<\/h2>\n<p>Tato funkce vy\u017eaduje t\u0159i parametry ve sv\u00e9 syntaxi:<\/p>\n<ul>\n<li>Alpha: pravd\u011bpodobnost, \u017ee prav\u00fd st\u0159edn\u00ed v\u00fdsledek nen\u00ed zahrnut v intervalu spolehlivosti. B\u011b\u017en\u011b se pou\u017e\u00edv\u00e1 hodnota 0,05 (co\u017e odpov\u00edd\u00e1 95% intervalu spolehlivosti).<\/li>\n<li>Standardn\u00ed odchylka: hodnota ukazuj\u00edc\u00ed rozptyl dat ve vzorku.<\/li>\n<li>Velikost vzorku: celkov\u00fd po\u010det pozorov\u00e1n\u00ed ve vzorku.<\/li>\n<\/ul>\n<p>Ve form\u00e1tu aplikace: <\/p>\n<pre><code>=CONFIDENCE(alpha, std_dev, size)<\/code><\/pre>\n<p>Pro MS Excel i Google Tabulky syntaxe funguje obdobn\u011b, av\u0161ak v Google Tabulk\u00e1ch se funkce jmenuje <code>CONFIDENCE.NORM<\/code>.<\/p>\n<h2>P\u0159\u00edklad praktick\u00e9ho vyu\u017eit\u00ed<\/h2>\n<p>P\u0159edstavme si, \u017ee jste prov\u00e1d\u011bli pr\u016fzkum spokojenosti z\u00e1kazn\u00edk\u016f a chcete spo\u010d\u00edtat 95% interval spolehlivosti pro pr\u016fm\u011brnou spokojenost. M\u00e1te vzorek 200 \u00fa\u010dastn\u00edk\u016f s pr\u016fm\u011brnou spokojenost\u00ed a rozptyl hodnot spokojenosti.<\/p>\n<p>Je d\u00e1no:<\/p>\n<ul>\n<li>Alpha = 0.05 (co\u017e odpov\u00edd\u00e1 95% intervalu spolehlivosti)<\/li>\n<li>Standardn\u00ed odchylka = 15<\/li>\n<li>Velikost vzorku = 200<\/li>\n<\/ul>\n<p>V Excelu nebo Google Tabulk\u00e1ch vypo\u010dtete:<\/p>\n<pre><code>=CONFIDENCE(0.05, 15, 200)<\/code><\/pre>\n<p>Tento p\u0159\u00edkaz v\u00e1m poskytne horn\u00ed mez intervalu spolehlivosti. Kdy\u017e p\u0159edpokl\u00e1d\u00e1me, \u017ee pr\u016fm\u011brn\u00e1 hodnota (nap\u0159\u00edklad 70) je st\u0159edn\u00ed hodnota pro spokojenost, m\u016f\u017eete o\u010dek\u00e1vat, \u017ee pr\u016fm\u011brn\u00e1 spokojenost v cel\u00e9 populaci bude v rozmez\u00ed:<\/p>\n<pre><code>70 \u00b1 CONFIDENCE(0.05, 15, 200)<\/code><\/pre>\n<h2>Jak aplikovat tuto funkci na re\u00e1ln\u00e9 obchodn\u00ed sc\u00e9n\u00e1\u0159e<\/h2>\n<p>P\u0159edstavte si, \u017ee pracujete pro v\u00fdrobn\u00ed spole\u010dnost a chcete zjistit, jak velk\u00fd vliv m\u00e1 nov\u00e1 v\u00fdrobn\u00ed linka na kvalitu v\u00fdrobk\u016f. Na z\u00e1klad\u011b 40 n\u00e1hodn\u011b vybran\u00fdch vzork\u016f a jejich hodnoten\u00ed chcete vyhodnotit pr\u016fm\u011brnou kvalitu v\u00fdrobk\u016f s 90% intervalu spolehlivosti.<\/p>\n<p>Je d\u00e1no:<\/p>\n<ul>\n<li>Alpha = 0.1<\/li>\n<li>Standardn\u00ed odchylka = 8<\/li>\n<li>Velikost vzorku = 40<\/li>\n<\/ul>\n<pre><code>=CONFIDENCE(0.1, 8, 40)<\/code><\/pre>\n<p>V v\u00fdsledku z\u00edsk\u00e1te horn\u00ed mez intervalu spolehlivosti, kterou m\u016f\u017eete pou\u017e\u00edt pro tvrzen\u00ed o pr\u016fm\u011brn\u00e9 kvalit\u011b. Tento v\u00fdsledek v\u00e1m pom\u016f\u017ee rozhodnout, zda budete pokra\u010dovat v pou\u017e\u00edv\u00e1n\u00ed nov\u00e9 v\u00fdrobn\u00ed linky \u010di provedete pot\u0159ebn\u00e9 \u00fapravy.<\/p>\n<p>Pou\u017eit\u00ed t\u011bchto statistick\u00fdch n\u00e1stroj\u016f umo\u017e\u0148uje podnik\u016fm a v\u00fdzkumn\u00edk\u016fm d\u011blat informovan\u011bj\u0161\u00ed rozhodnut\u00ed na z\u00e1klad\u011b dat a minimalizovat rizika spojen\u00e1 s nep\u0159esnostmi ve vzorc\u00edch dat.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Vr\u00e1t\u00ed interval spolehlivosti pro st\u0159edn\u00ed hodnotu z\u00e1kladn\u00edho souboru<\/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-5481","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 CONFIDENCE v Excelu: jak funguje, primjeri kori\u0161tenja formule<\/title>\n<meta name=\"description\" content=\"Opis funkcije CONFIDENCE u Excelu i Google tablicama. 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