{"id":642,"date":"2021-09-11T13:56:20","date_gmt":"2021-09-11T13:56:20","guid":{"rendered":"https:\/\/searchenginereports.net\/blog\/?p=642"},"modified":"2021-09-11T13:58:57","modified_gmt":"2021-09-11T13:58:57","slug":"valid-sample-size-for-confidence-interval","status":"publish","type":"post","link":"https:\/\/dev.searchenginereports.net\/blog\/cs\/platna-velikost-vzorku-pro-interval-spolehlivosti\/","title":{"rendered":"Platn\u00e1-velikost-vzorku-pro-v\u00fdpo\u010det-intervalu-spolehlivosti"},"content":{"rendered":"

V\u00fdpo\u010det intervalu spolehlivosti zahrnuje n\u011bkolik slo\u017eitost\u00ed pro statistiky. Jedn\u00edm z hlavn\u00edch probl\u00e9m\u016f, kter\u00fdm lid\u00e9 \u010del\u00ed, je ur\u010den\u00ed platn\u00e9 velikosti vzorku pro v\u00fdpo\u010det p\u0159esn\u00fdch v\u00fdsledk\u016f a dokon\u010den\u00ed pr\u016fzkumu. Probl\u00e9m nast\u00e1v\u00e1 hlavn\u011b u lid\u00ed, kte\u0159\u00ed nestudovali statistiky na vysok\u00e9 \u0161kole nebo univerzit\u011b, nebo jim metoda v\u00fdpo\u010dtu \u00fapln\u011b zmizela z pam\u011bti. Pokud m\u00e1te tak\u00e9 stejn\u00fd dotaz, pak je tento blog p\u0159edev\u0161\u00edm pro v\u00e1s. Jsme zde, abychom probrali snadn\u00fd zp\u016fsob v\u00fdb\u011bru platn\u00e9 velikosti vzorku pro v\u00fdpo\u010det intervalu spolehlivosti. Nemus\u00edte propadat panice ani znovu proch\u00e1zet sv\u00e9 studijn\u00ed knihy, abyste se dozv\u011bd\u011bli o velikosti vzorku, proto\u017ee v\u0161e jsme probrali v tomto blogu. Tak\u017ee bez dal\u0161\u00edch okolk\u016f m\u016f\u017eeme za\u010d\u00edt!<\/span><\/p>\n

\u00a0<\/span><\/p>\n

Jak\u00e1 je p\u0159esn\u00e1 velikost vzorku pro rozhodov\u00e1n\u00ed?<\/strong><\/h2>\n

P\u0159i anal\u00fdze konkr\u00e9tn\u00edho experimentu nebo v\u00fdzkumu hraje p\u0159esnost velikosti vzorku hlavn\u00ed roli v rozhodovac\u00edm procesu. Obrovsk\u00e9 mno\u017estv\u00ed dat umo\u017e\u0148uje v\u00fdzkumn\u00edk\u016fm \u010dinit p\u0159esn\u00e1 rozhodnut\u00ed s men\u0161\u00ed m\u00edrou chyb. To v\u0161ak neznamen\u00e1, \u017ee pro p\u0159esn\u00e9 v\u00fdsledky v\u017edy pot\u0159ebujete velk\u00fd vzorek.<\/span><\/p>\n

P\u0159i porovn\u00e1v\u00e1n\u00ed pr\u016fm\u011br\u016f dvou populac\u00ed se pou\u017e\u00edvaj\u00ed dva r\u016fzn\u00e9 typy test\u016f podle velikosti populace. Pokud je velikost populace v\u011bt\u0161\u00ed ne\u017e 30, pak mus\u00ed statistici pou\u017e\u00edt Z-test; na druh\u00e9 stran\u011b, pokud je velikost vzorku men\u0161\u00ed ne\u017e 30, pak se pou\u017eije t-test.<\/span><\/p>\n

\u00a0<\/span><\/p>\n

Role \u00farovn\u011b spolehlivosti a hranice chyby<\/strong><\/h2>\n

Krom\u011b zv\u00e1\u017een\u00ed platn\u00e9 velikosti vzorku pro v\u00fdpo\u010det interval\u016f spolehlivosti jak\u00e9hokoli pr\u016fzkumu mus\u00edte tak\u00e9 porozum\u011bt roli \u00farovn\u011b spolehlivosti a rozp\u011bt\u00ed chyb. Tyto dva prvky tak\u00e9 hraj\u00ed z\u00e1sadn\u00ed roli p\u0159i hled\u00e1n\u00ed interval\u016f, mezi kter\u00fdmi existuje skute\u010dn\u00fd parametr populace. Poj\u010fme pochopit, jak tyto dva prvky ovliv\u0148uj\u00ed v\u00fdpo\u010det intervalu spolehlivosti jak\u00e9hokoli pr\u016fzkumu.<\/span><\/p>\n

\u00darove\u0148 spolehlivosti je v podstat\u011b rozsah, kter\u00fd ur\u010duje pravd\u011bpodobnost nejistoty spojen\u00e9 s odhadem. Pokud chcete vy\u0161\u0161\u00ed \u00farove\u0148 spolehlivosti, pot\u0159ebujete pro proveden\u00ed tohoto pr\u016fzkumu v\u011bt\u0161\u00ed vzorek. Naproti tomu mezn\u00ed hodnota chyby je m\u00edra p\u0159esnosti, kterou v\u00fdzkumn\u00edk po\u017eaduje ve sv\u00e9m odhadu. Odhad m\u00edry chyb se obvykle bere v procentech, proto\u017ee odr\u00e1\u017e\u00ed pravd\u011bpodobnost, \u017ee pr\u016fzkum p\u0159ekro\u010d\u00ed intervaly spolehlivosti.<\/span><\/p>\n

\u00a0<\/span><\/p>\n

Z\u00edskejte p\u0159esn\u00e9 v\u00fdsledky s kalkula\u010dkou intervalu spolehlivosti\u00a0<\/strong><\/h2>\n

Bez ohledu na to, jak slo\u017eit\u00e1 jsou va\u0161e data, m\u016f\u017eete snadno vypo\u010d\u00edtat intervaly spolehlivosti zad\u00e1n\u00edm \u010d\u00e1stek do dan\u00fdch pol\u00ed. Kalkula\u010dka intervalu spolehlivosti<\/a> dostupn\u00e1 na searchenginereports.net je nejlep\u0161\u00edm n\u00e1strojem, kter\u00fd m\u016f\u017eete na webu naj\u00edt pro v\u00fdpo\u010det p\u0159esn\u00fdch v\u00fdsledk\u016f. N\u00e1\u0161 webov\u00fd port\u00e1l p\u0159edstavuje pro sv\u00e9 u\u017eivatele bezplatn\u00fd n\u00e1stroj a neklade \u017e\u00e1dn\u00e1 omezen\u00ed na jeho pou\u017eit\u00ed. Pomoc\u00ed kalkul\u00e1toru intervalu spolehlivosti m\u016f\u017eete prov\u00e9st libovoln\u00fd po\u010det v\u00fdpo\u010dt\u016f. Tento online n\u00e1stroj v\u00e1s ne\u017e\u00e1d\u00e1, abyste se registrovali nebo k n\u011bmu p\u0159istupovali prost\u0159ednictv\u00edm konkr\u00e9tn\u00edho za\u0159\u00edzen\u00ed, proto\u017ee je kompatibiln\u00ed se v\u0161emi opera\u010dn\u00edmi syst\u00e9my.<\/span><\/p>\n

\u00a0<\/span><\/p>\n

To je ono!<\/strong><\/h3>\n

Platnost-velikosti-vzorku-je-z\u00e1sadn\u00ed-pro-v\u00fdpo\u010det-interval\u016f-spolehlivosti.-M\u00edsto-ru\u010dn\u00edch-metod-m\u016f\u017eete-pou\u017e\u00edt-automatizovan\u00fd-n\u00e1stroj-pro-v\u00fdpo\u010det-interval\u016f-spolehlivosti-b\u011bhem-n\u011bkolika-sekund.-P\u0159i-prov\u00e1d\u011bn\u00ed-tohoto-v\u00fdpo\u010dtu-se-nemus\u00edte-spol\u00e9hat-na-pomoc-odborn\u00edk\u016f.-U\u017eivatelsky-p\u0159\u00edv\u011btiv\u00e9-rozhran\u00ed-kalkul\u00e1toru-intervalu-spolehlivosti-v\u00e1m-umo\u017en\u00ed-z\u00edskat-p\u0159esn\u00e9-v\u00fdsledky-bez-jak\u00fdchkoli-pot\u00ed\u017e\u00ed.<\/span><\/p>","protected":false},"excerpt":{"rendered":"

The confidence interval calculation involves several intricacies for statisticians. One of the major problems faced by people is the determination of a<\/p>","protected":false},"author":6,"featured_media":644,"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\/642"}],"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=642"}],"version-history":[{"count":4,"href":"https:\/\/dev.searchenginereports.net\/blog\/cs\/wp-json\/wp\/v2\/posts\/642\/revisions"}],"predecessor-version":[{"id":647,"href":"https:\/\/dev.searchenginereports.net\/blog\/cs\/wp-json\/wp\/v2\/posts\/642\/revisions\/647"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dev.searchenginereports.net\/blog\/cs\/wp-json\/wp\/v2\/media\/644"}],"wp:attachment":[{"href":"https:\/\/dev.searchenginereports.net\/blog\/cs\/wp-json\/wp\/v2\/media?parent=642"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dev.searchenginereports.net\/blog\/cs\/wp-json\/wp\/v2\/categories?post=642"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dev.searchenginereports.net\/blog\/cs\/wp-json\/wp\/v2\/tags?post=642"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}