{"id":648,"date":"2021-09-20T08:04:04","date_gmt":"2021-09-20T08:04:04","guid":{"rendered":"https:\/\/searchenginereports.net\/blog\/?p=648"},"modified":"2021-09-20T08:05:52","modified_gmt":"2021-09-20T08:05:52","slug":"determine-confidence-level","status":"publish","type":"post","link":"https:\/\/dev.searchenginereports.net\/blog\/cs\/urcit-uroven-spolehlivosti\/","title":{"rendered":"Ur\u010den\u00ed-\u00farovn\u011b-spolehlivosti-na-z\u00e1klad\u011b-velikosti-vzorku-a-meze-chyby"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Pokud jde o nalezen\u00ed interval\u016f spolehlivosti po posouzen\u00ed velikosti vzorku a chybovosti, statistici pot\u0159ebuj\u00ed ur\u010dit dokonalou \u00farove\u0148 spolehlivosti, kter\u00e1 jim pom\u016f\u017ee uzav\u0159\u00edt studii s minim\u00e1ln\u00ed m\u00edrou nejistoty. Data shrom\u00e1\u017ed\u011bn\u00e1 ze vzorku nelze ve statistice pova\u017eovat za pravdiv\u00e1 100%, proto\u017ee kone\u010dn\u00e9 v\u00fdsledky m\u016f\u017ee ovlivnit n\u011bkolik parametr\u016f. Proto, aby se vyhov\u011blo nejistot\u011b spojen\u00e9 s v\u00fdb\u011brem p\u0159esn\u00e9 velikosti vzorku, statistici vyu\u017e\u00edvaj\u00ed meze chyby.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Mo\u017en\u00e1 v\u00e1s te\u010f zaj\u00edm\u00e1, jak lze ur\u010dit \u00farove\u0148 spolehlivosti s velikost\u00ed vzorku a chybou. Tento proces lze prov\u00e9st pomoc\u00ed n\u011bkolika ru\u010dn\u00edch v\u00fdpo\u010dt\u016f, o kter\u00fdch budeme diskutovat v tomto blogu. Tak\u017ee bez dal\u0161\u00edch \u0159e\u010d\u00ed jdeme na to!<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0<\/span><\/p>\n<h2><strong>Vypo\u010d\u00edtejte \u00farovn\u011b spolehlivosti a intervaly<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">Mnohokr\u00e1t se lid\u00e9 pletou mezi \u00farovn\u00ed spolehlivosti a intervaly spolehlivosti. Tyto \u00fazce souvisej\u00edc\u00ed term\u00edny se pou\u017e\u00edvaj\u00ed spole\u010dn\u011b k anal\u00fdze velikosti vzorku, p\u0159i\u010dem\u017e je t\u0159eba m\u00edt na pam\u011bti m\u00edru chyb.\u00a0<\/span><\/p>\n<h3><\/h3>\n<p>&nbsp;<\/p>\n<h3><strong>\u00darove\u0148 spolehlivosti:\u00a0<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">\u00darove\u0148 spolehlivosti je \u00farove\u0148 jistoty, kterou m\u00e1te ve velikosti vzorku a kter\u00e1 v\u00e1m poskytne v\u00fdsledky, kter\u00e9 hled\u00e1te.<\/span><\/p>\n<h3><\/h3>\n<p>&nbsp;<\/p>\n<h3><strong>Interval spolehlivosti:\u00a0<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Naproti tomu intervaly spolehlivosti p\u0159edstavuj\u00ed rozsah hodnot, mezi kter\u00fdmi by se mohly vyskytnout v\u00fdsledky va\u0161\u00ed velikosti vzorku.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Ur\u010den\u00ed \u00farovn\u00ed spolehlivosti nen\u00ed slo\u017eit\u00fd \u00fakol, ale v\u00fdpo\u010det interval\u016f v\u00e1s m\u016f\u017ee nechat \u0161kr\u00e1bat na hlav\u011b. Chcete-li naj\u00edt interval spolehlivosti, mus\u00edte ur\u010dit m\u00edru chyby, kter\u00e1 odpov\u00edd\u00e1 pot\u0159eb\u00e1m va\u0161eho vzorku. Statistici a v\u00fdzkumn\u00edci pou\u017e\u00edvaj\u00ed \u00farove\u0148 spolehlivosti od 80% do 99%. Nej\u010dast\u011bji pou\u017e\u00edvan\u00e1 \u00farove\u0148 spolehlivosti je 95%. V takov\u00e9m p\u0159\u00edpad\u011b, pokud zjist\u00edte \u00farove\u0148 spolehlivosti 95%, mus\u00edte se pod\u00edvat na Z-tabulku, proto\u017ee se v\u00e1m dostane do rukou p\u0159esn\u00e9 Z-sk\u00f3re.<\/span><\/p>\n<p><b>\u00a0<\/b><\/p>\n<h2><strong>Naj\u00edt okraj chyby<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">Po ur\u010den\u00ed \u00farovn\u011b spolehlivosti nyn\u00ed mus\u00edte naj\u00edt standardn\u00ed chybu pro v\u00e1\u0161 vzorek. Standardn\u00ed chybu nebo meze chyby lze vypo\u010d\u00edtat pomoc\u00ed n\u00e1sleduj\u00edc\u00edho vzorce:<\/span><\/p>\n<p style=\"text-align: center;\"><b>\u00a0 SE = s\/\u221an<\/b><\/p>\n<p><span style=\"font-weight: 400;\">V tomto vzorci s p\u0159edstavuje sm\u011brodatnou odchylku va\u0161eho vzorku a n p\u0159edstavuje velikost vzorku. Po nalezen\u00ed hranice chyby je dal\u0161\u00edm krokem implementace t\u011bchto hodnot do vzorce intervalu spolehlivosti.<\/span><\/p>\n<p style=\"text-align: center;\"><b>\u00a0CI = pr\u016fm\u011br \u00b1 Z-sk\u00f3re x SE<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Pomoc\u00ed v\u00fd\u0161e uveden\u00e9ho vzorce m\u016f\u017eete zjistit intervaly spolehlivosti pro v\u00e1\u0161 vzorek. Z-sk\u00f3re pro v\u00e1mi vybranou \u00farove\u0148 spolehlivosti m\u016f\u017eete z\u00edskat z tabulky Z. Nap\u0159\u00edklad Z-sk\u00f3re pro \u00farove\u0148 spolehlivosti 95% je 1,96. Tuto hodnotu mus\u00edte v dan\u00e9m vzorci pou\u017e\u00edt k v\u00fdpo\u010dtu rozsahu interval\u016f spolehlivosti.<\/span><\/p>\n<h2><\/h2>\n<p>&nbsp;<\/p>\n<h2><strong>Snadn\u00e1 cesta ven \u2013 Kalkula\u010dka intervalu spolehlivosti<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">Cel\u00fd tento proces v\u00fdpo\u010dtu interval\u016f spolehlivosti m\u016f\u017ee skon\u010dit zabrat spoustu \u010dasu. Krom\u011b toho pot\u0159ebujete dobrou znalost ru\u010dn\u00edch v\u00fdpo\u010dt\u016f, abyste z\u00edskali p\u0159esn\u00e9 v\u00fdsledky. Pokud si nep\u0159ejete proj\u00edt t\u00edmto probl\u00e9mem, nemus\u00edte se ob\u00e1vat, proto\u017ee <\/span><a href=\"https:\/\/searchenginereports.net\/confidence-interval-calculator\"><span style=\"font-weight: 400;\">kalkula\u010dka \u00farovn\u011b spolehlivosti<\/span><\/a><span style=\"font-weight: 400;\"> je online n\u00e1stroj dostupn\u00fd pro va\u0161i z\u00e1chranu. Tuto slu\u017ebu m\u016f\u017eete pou\u017e\u00edvat zdarma a generovat v\u00fdsledky b\u011bhem n\u011bkolika sekund.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0<\/span><\/p>\n<h3><strong>To je v\u0161e!<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Informace-diskutovan\u00e9-v-tomto-blogu-v\u00e1m-pomohou-ur\u010dit-intervaly-spolehlivosti-a-\u00farovn\u011b-pomoc\u00ed-vhodn\u00e9-velikosti-vzorku-a-chybovosti,-ani\u017e-byste-museli-\u010delit-jak\u00e9koli-obt\u00ed\u017enosti.-Nyn\u00ed-je-jen-na-v\u00e1s,-zda-chcete-pou\u017e\u00edt-manu\u00e1ln\u00ed-metodu-nebo-pou\u017e\u00edt-automatizovan\u00fd-n\u00e1stroj-pro-v\u00fdpo\u010det-interval\u016f-spolehlivosti.\u00a0 <\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>When it comes to finding confidence intervals after the assessment of sample size and margin of error, statisticians need to determine a<\/p>","protected":false},"author":6,"featured_media":652,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[21],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/dev.searchenginereports.net\/blog\/cs\/wp-json\/wp\/v2\/posts\/648"}],"collection":[{"href":"https:\/\/dev.searchenginereports.net\/blog\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dev.searchenginereports.net\/blog\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dev.searchenginereports.net\/blog\/cs\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/dev.searchenginereports.net\/blog\/cs\/wp-json\/wp\/v2\/comments?post=648"}],"version-history":[{"count":6,"href":"https:\/\/dev.searchenginereports.net\/blog\/cs\/wp-json\/wp\/v2\/posts\/648\/revisions"}],"predecessor-version":[{"id":657,"href":"https:\/\/dev.searchenginereports.net\/blog\/cs\/wp-json\/wp\/v2\/posts\/648\/revisions\/657"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dev.searchenginereports.net\/blog\/cs\/wp-json\/wp\/v2\/media\/652"}],"wp:attachment":[{"href":"https:\/\/dev.searchenginereports.net\/blog\/cs\/wp-json\/wp\/v2\/media?parent=648"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dev.searchenginereports.net\/blog\/cs\/wp-json\/wp\/v2\/categories?post=648"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dev.searchenginereports.net\/blog\/cs\/wp-json\/wp\/v2\/tags?post=648"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}