{"id":5591,"date":"2025-07-15T13:34:45","date_gmt":"2025-07-15T13:34:45","guid":{"rendered":"https:\/\/functiontranslator.com\/ftest\/"},"modified":"2021-02-26T09:55:59","modified_gmt":"2021-02-26T09:55:59","slug":"ftest","status":"publish","type":"post","link":"https:\/\/functiontranslator.com\/cs\/ftest\/","title":{"rendered":"FTEST"},"content":{"rendered":"

FTEST je statistick\u00e1 funkce dostupn\u00e1 v Microsoft Excel a Google Sheets. Pou\u017e\u00edv\u00e1 se k ov\u011b\u0159en\u00ed, zda maj\u00ed dva vzorky dat stejnou varianci, co\u017e je zn\u00e1m\u00e9 jako F-test rovnosti dvou rozptyl\u016f. Tato funkce je velmi u\u017eite\u010dn\u00e1 pro v\u011bdeck\u00fd v\u00fdzkum a dal\u0161\u00ed aplikace, kde je pot\u0159eba ur\u010dit, zda jsou dv\u011b skupiny experiment\u00e1ln\u00edch v\u00fdsledk\u016f statisticky srovnateln\u00e9 z hlediska jejich variability.<\/p>\n

Syntaxe a pou\u017eit\u00ed<\/h2>\n

Syntaxe funkce FTEST je n\u00e1sleduj\u00edc\u00ed:<\/p>\n

 = FTEST(array1, array2) <\/code><\/pre>\n
Kde array1<\/code> a array2<\/code> jsou pole \u010d\u00edseln\u00fdch dat, kter\u00e1 chcete porovnat z hlediska rovnosti rozptyl\u016f.<\/p>\n
P\u0159\u00edklad:<\/strong><\/p>\n
 = FTEST(A1:A10, B1:B10) <\/code><\/pre>\n
Tento p\u0159\u00edklad ukazuje pou\u017eit\u00ed F-testu na datech ulo\u017een\u00fdch v rozsaz\u00edch bun\u011bk A1 a\u017e A10 pro prvn\u00ed vzorek a B1 a\u017e B10 pro druh\u00fd vzorek.<\/p>\n
P\u0159\u00edklady praktick\u00e9ho vyu\u017eit\u00ed<\/h2>\n
Funkce FTEST je aplikovateln\u00e1 v mnoha situac\u00edch, zejm\u00e9na tam, kde je t\u0159eba ov\u011b\u0159it shodu rozptyl\u016f dvou rozd\u00edln\u00fdch datov\u00fdch soubor\u016f. Zde jsou dv\u011b typick\u00e9 aplikace:<\/p>\n
Testov\u00e1n\u00ed konzistence v\u00fdsledk\u016f produkce dvou stroj\u016f<\/h2>\n
P\u0159edstavme si, \u017ee m\u00e1me dv\u011b s\u00e9rie m\u011b\u0159en\u00ed, ka\u017ed\u00e1 proveden\u00e1 na jin\u00e9m v\u00fdrobn\u00edm stroji, a chceme zjistit, zda oba stroje dod\u00e1vaj\u00ed stejn\u011b konzistentn\u00ed v\u00fdsledky.<\/p>\n
    \n
  • Stroj 1 vyprodukoval hodnoty: 10, 12, 9, 11, 13<\/li>\n
  • Stroj 2 vyprodukoval hodnoty: 8, 11, 7, 12, 10<\/li>\n<\/ul>\n
     = FTEST(A1:A5, B1:B5) <\/code><\/pre>\n
    Je-li v\u00fdsledn\u00e1 hodnota bl\u00edzk\u00e1 1, rozd\u00edl v rozptylu nen\u00ed statisticky v\u00fdznamn\u00fd. Hodnota bl\u00edzk\u00e1 0 ukazuje na pravd\u011bpodobn\u00fd rozd\u00edl v rozptylu mezi zkouman\u00fdmi sady dat.<\/p>\n
    Anal\u00fdza kvality v\u00fdrobk\u016f z r\u016fzn\u00fdch z\u00e1silek<\/h2>\n
    Kontrolor kvality m\u016f\u017ee cht\u00edt porovnat variabilitu rozm\u011br\u016f d\u00edl\u016f z r\u016fzn\u00fdch z\u00e1silek. \u00dadaje mohou b\u00fdt n\u00e1sleduj\u00edc\u00ed:<\/p>\n
      \n
    • Z\u00e1silka 1: 100, 102, 98, 105, 101<\/li>\n
    • Z\u00e1silka 2: 99, 95, 100, 102, 98<\/li>\n<\/ul>\n
       = FTEST(C1:C5, D1:D5) <\/code><\/pre>\n
      Op\u011bt plat\u00ed, \u017ee vysok\u00e1 hodnota pobl\u00ed\u017e 1 indikuje mal\u00fd rozd\u00edl mezi variability, co\u017e znamen\u00e1, \u017ee ob\u011b z\u00e1silky maj\u00ed podobnou kvalitu. N\u00edzk\u00e1 hodnota v\u0161ak nazna\u010duje v\u00fdznamn\u00fd rozd\u00edl ve variabilit\u011b mezi skupinami.<\/p>\n
      Tyto p\u0159\u00edklady ilustruj\u00ed, jak FTEST m\u016f\u017ee b\u00fdt u\u017eite\u010dn\u00e1 pro ove\u0159ov\u00e1n\u00ed konzistence a homogenity r\u016fzn\u00fdch datov\u00fdch soubor\u016f v praxi. P\u0159i interpretaci v\u00fdsledk\u016f je v\u0161ak kl\u00ed\u010dov\u00e9 zohlednit i dal\u0161\u00ed anal\u00fdzy a kontext, aby byly z\u00e1v\u011bry co nejspolehliv\u011bj\u0161\u00ed.<\/p>\n","protected":false},"excerpt":{"rendered":"
      Vr\u00e1t\u00ed v\u00fdsledek F-testu<\/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-5591","post","type-post","status-publish","format-standard","hentry","category-kompatibilita"],"acf":[],"yoast_head":"\nFunkce FTEST v Excelu: jak funguje, primjeri kori\u0161tenja formule<\/title>\n<meta name=\"description\" content=\"Opis funkcije FTEST u Excelu i Google tablicama. 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