{"id":26638,"date":"2023-02-08T09:50:00","date_gmt":"2023-02-08T12:50:00","guid":{"rendered":"https:\/\/mindthegraph.com\/blog\/the-science-behind-falling-in-love-copy\/"},"modified":"2023-04-05T10:55:10","modified_gmt":"2023-04-05T13:55:10","slug":"statistics-parametric-tests","status":"publish","type":"post","link":"https:\/\/mindthegraph.com\/blog\/hu\/statistics-parametric-tests\/","title":{"rendered":"Mik azok a statisztikai parametrikus tesztek \u00e9s hol kell alkalmazni \u0151ket?"},"content":{"rendered":"<p>A statisztikai parametrikus tesztek a statisztikai elemz\u00e9s egy olyan t\u00edpusa, amelyet a popul\u00e1ci\u00f3 \u00e1tlag\u00e1ra \u00e9s sz\u00f3r\u00e1s\u00e1ra vonatkoz\u00f3 hipot\u00e9zisek tesztel\u00e9s\u00e9re haszn\u00e1lnak. Ezek a tesztek azon a felt\u00e9telez\u00e9sen alapulnak, hogy az alapul szolg\u00e1l\u00f3 adatok norm\u00e1lis eloszl\u00e1st k\u00f6vetnek, \u00e9s sz\u00e1mos kulcsfontoss\u00e1g\u00fa tulajdons\u00e1ggal rendelkeznek, bele\u00e9rtve a robusztuss\u00e1got, a megb\u00edzhat\u00f3s\u00e1got \u00e9s az adatokban l\u00e9v\u0151 finom k\u00fcl\u00f6nbs\u00e9gek kimutat\u00e1s\u00e1nak k\u00e9pess\u00e9g\u00e9t.<\/p>\n\n\n\n<p>A parametrikus teszteket gyakran haszn\u00e1lj\u00e1k k\u00fcl\u00f6nb\u00f6z\u0151 alkalmaz\u00e1sokban, t\u00f6bbek k\u00f6z\u00f6tt az orvosi kutat\u00e1sban, a piackutat\u00e1sban \u00e9s a t\u00e1rsadalomtudom\u00e1nyokban. Ezeken a ter\u00fcleteken a kutat\u00f3k parametrikus teszteket haszn\u00e1lhatnak a popul\u00e1ci\u00f3s \u00e1tlagok vagy varianci\u00e1k v\u00e1ltoz\u00e1sainak szignifikanci\u00e1j\u00e1nak meghat\u00e1roz\u00e1s\u00e1ra, vagy annak meg\u00e1llap\u00edt\u00e1s\u00e1ra, hogy egy adott kezel\u00e9s vagy beavatkoz\u00e1s jelent\u0151s hat\u00e1ssal volt-e az adatokra.<\/p>\n\n\n\n<h2>A statisztik\u00e1k leggyakoribb t\u00edpusai parametrikus tesztek<\/h2>\n\n\n\n<h3>A t-pr\u00f3ba&nbsp;<\/h3>\n\n\n\n<p>Az egyik leggyakrabban haszn\u00e1lt parametrikus teszt a t-pr\u00f3ba, amelyet k\u00e9t popul\u00e1ci\u00f3 \u00e1tlag\u00e1nak \u00f6sszehasonl\u00edt\u00e1s\u00e1ra haszn\u00e1lnak. A <a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC4667138\/\">t-test<\/a> felt\u00e9telezi, hogy az alapul szolg\u00e1l\u00f3 adatok norm\u00e1lis eloszl\u00e1s\u00faak, \u00e9s hogy a k\u00e9t popul\u00e1ci\u00f3 sz\u00f3r\u00e1sa egyenl\u0151. A tesztstatisztik\u00e1t a k\u00e9t popul\u00e1ci\u00f3 \u00e1tlag\u00e1nak k\u00fcl\u00f6nbs\u00e9g\u00e9b\u0151l \u00e9s a k\u00fcl\u00f6nbs\u00e9g standard hib\u00e1j\u00e1val osztva sz\u00e1m\u00edtj\u00e1k ki.<\/p>\n\n\n\n<h3>ANOVA teszt<\/h3>\n\n\n\n<p>Egy m\u00e1sik gyakori parametrikus teszt a varianciaanal\u00edzis (ANOVA), amelyet h\u00e1rom vagy t\u00f6bb popul\u00e1ci\u00f3 \u00e1tlag\u00e1nak \u00f6sszehasonl\u00edt\u00e1s\u00e1ra haszn\u00e1lnak. A <a href=\"https:\/\/jbhender.github.io\/Stats506\/F18\/GP\/Group3.html\">ANOVA teszt<\/a> felt\u00e9telezi, hogy az alapul szolg\u00e1l\u00f3 adatok norm\u00e1lis eloszl\u00e1s\u00faak, \u00e9s hogy az \u00f6sszes popul\u00e1ci\u00f3 sz\u00f3r\u00e1sa egyenl\u0151. A tesztstatisztik\u00e1t a popul\u00e1ci\u00f3k k\u00f6z\u00f6tti variancia \u00e9s a popul\u00e1ci\u00f3kon bel\u00fcli variancia h\u00e1nyados\u00e1val sz\u00e1m\u00edtj\u00e1k ki.<\/p>\n\n\n\n<h3>Egy\u00e9b parametrikus tesztek<\/h3>\n\n\n\n<p>A t-teszt \u00e9s az ANOVA mellett sz\u00e1mos m\u00e1s statisztikai parametrikus teszt is l\u00e9tezik, amelyeket k\u00fcl\u00f6nb\u00f6z\u0151 alkalmaz\u00e1sokban haszn\u00e1lnak, bele\u00e9rtve a p\u00e1ros\u00edtott t-tesztet, az egyutas ANOVA-t, a k\u00e9tutas ANOVA-t, az ism\u00e9telt m\u00e9r\u00e9sekkel v\u00e9gzett ANOVA-t \u00e9s a vegyes ANOVA-t is. E tesztek mindegyike k\u00fcl\u00f6nb\u00f6z\u0151 felt\u00e9telez\u00e9sekkel \u00e9s tesztstatisztik\u00e1kkal rendelkezik, \u00e9s k\u00fcl\u00f6nb\u00f6z\u0151 t\u00edpus\u00fa kutat\u00e1si k\u00e9rd\u00e9sek megv\u00e1laszol\u00e1s\u00e1ra haszn\u00e1lj\u00e1k.<\/p>\n\n\n\n<p>A parametrikus tesztek egyik legfontosabb el\u0151nye, hogy robosztusak, azaz nem \u00e9rz\u00e9kenyek a m\u00f6g\u00f6ttes adateloszl\u00e1s alakj\u00e1ra. Am\u00edg az adatok megk\u00f6zel\u00edt\u0151leg norm\u00e1lis eloszl\u00e1s\u00faak, a parametrikus tesztek pontos eredm\u00e9nyeket adnak.<\/p>\n\n\n\n<h2>Csod\u00e1latos infografik\u00e1k k\u00e9sz\u00edt\u00e9se percek alatt<\/h2>\n\n\n\n<p>Az Mind the Graph a t\u00f6k\u00e9letes eszk\u00f6z adatainak \u00f6sszegy\u0171jt\u00e9s\u00e9re \u00e9s vizu\u00e1lis bemutat\u00e1s\u00e1ra. Haszn\u00e1ljon diagramok, t\u00e1bl\u00e1zatok \u00e9s tudom\u00e1nyos illusztr\u00e1ci\u00f3k seg\u00edts\u00e9g\u00e9vel, hogy munk\u00e1ja k\u00f6nnyebben \u00e9rthet\u0151 legyen.<\/p>\n\n\n\n<div style=\"height:18px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"is-layout-flex wp-block-buttons\">\n<div class=\"wp-block-button aligncenter\"><a class=\"wp-block-button__link has-background wp-element-button\" href=\"https:\/\/mindthegraph.com\/\" style=\"border-radius:50px;background-color:#dc1866\" target=\"_blank\" rel=\"noreferrer noopener\">Az els\u0151 infografik\u00e1m l\u00e9trehoz\u00e1sa<\/a><\/div>\n<\/div>\n\n\n\n<div style=\"height:18px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2>A statisztikai parametrikus tesztek megb\u00edzhat\u00f3s\u00e1ga<\/h2>\n\n\n\n<p>A parametrikus tesztek m\u00e1sik el\u0151nye a megb\u00edzhat\u00f3s\u00e1guk, mivel j\u00f3l bev\u00e1lt statisztikai m\u00f3dszereken \u00e9s felt\u00e9telez\u00e9seken alapulnak. A parametrikus tesztek eredm\u00e9nyei nagym\u00e9rt\u00e9kben megism\u00e9telhet\u0151k, \u00e9s felhaszn\u00e1lhat\u00f3k a m\u00f6g\u00f6ttes sokas\u00e1gra vonatkoz\u00f3 \u00e9rv\u00e9nyes k\u00f6vetkeztet\u00e9sek levon\u00e1s\u00e1ra.<\/p>\n\n\n\n<p>Sz\u00e1mos el\u0151ny\u00fck ellen\u00e9re a parametrikus tesztek nem mindig a legjobb v\u00e1laszt\u00e1s minden adathalmaz eset\u00e9ben. Egyes esetekben el\u0151fordulhat, hogy az alapul szolg\u00e1l\u00f3 adatok nem norm\u00e1lis eloszl\u00e1s\u00faak, vagy a popul\u00e1ci\u00f3k sz\u00f3r\u00e1sa nem egyenl\u0151. Ezekben az esetekben a nem parametrikus tesztek megfelel\u0151bbek lehetnek.<\/p>\n\n\n\n<h2>Parametrikus tesztek vs. nemparametrikus tesztek<\/h2>\n\n\n\n<p>A nem parametrikus tesztek olyan t\u00edpus\u00fa statisztikai elemz\u00e9sek, amelyek nem tesznek feltev\u00e9seket az adatok eloszl\u00e1s\u00e1r\u00f3l. Ehelyett az adatok rangsor\u00e1ra t\u00e1maszkodnak az eredm\u00e9nyek szignifikanci\u00e1j\u00e1nak meghat\u00e1roz\u00e1s\u00e1hoz. N\u00e9h\u00e1ny gyakori nem parametrikus teszt a k\u00f6vetkez\u0151 <a href=\"https:\/\/data.library.virginia.edu\/the-wilcoxon-rank-sum-test\/\">Wilcoxon rangsor-\u00f6sszeg teszt<\/a>, a <a href=\"https:\/\/en.wikipedia.org\/wiki\/Kruskal%E2%80%93Wallis_one-way_analysis_of_variance\">Kruskal-Wallis teszt<\/a>, \u00e9s a <a href=\"https:\/\/en.wikipedia.org\/wiki\/Mann%E2%80%93Whitney_U_test\">Mann-Whitney teszt<\/a>.<\/p>\n\n\n\n<p>A parametrikus \u00e9s nem parametrikus tesztek k\u00f6z\u00f6tti v\u00e1laszt\u00e1skor fontos figyelembe venni az adatok jelleg\u00e9t \u00e9s a vizsg\u00e1lt kutat\u00e1si k\u00e9rd\u00e9st. \u00c1ltal\u00e1ban a parametrikus tesztek olyan adatok eset\u00e9ben megfelel\u0151ek, amelyek norm\u00e1lis eloszl\u00e1s\u00faak \u00e9s egyenl\u0151 sz\u00f3r\u00e1s\u00faak, m\u00edg a nem parametrikus tesztek olyan adatok eset\u00e9ben megfelel\u0151ek, amelyek nem felelnek meg ezeknek a felt\u00e9telez\u00e9seknek.<\/p>\n\n\n\n<h2>P\u00e9lda egy statisztikai parametrikus tesztre<\/h2>\n\n\n\n<p>Tegy\u00fck fel, hogy egy kutat\u00f3 azt szeretn\u00e9 megvizsg\u00e1lni, hogy van-e k\u00fcl\u00f6nbs\u00e9g k\u00e9t gyermekcsoport - az A \u00e9s a B csoport - \u00e1tlagos magass\u00e1ga k\u00f6z\u00f6tt. Ehhez a kutat\u00f3 mindk\u00e9t csoportb\u00f3l v\u00e9letlenszer\u0171en kiv\u00e1laszt 20 gyermeket, \u00e9s megm\u00e9ri a magass\u00e1gukat.<\/p>\n\n\n\n<p>A kutat\u00f3 arra k\u00edv\u00e1ncsi, hogy az A csoportba tartoz\u00f3 gyermekek \u00e1tlagos magass\u00e1ga k\u00fcl\u00f6nb\u00f6zik-e a B csoportba tartoz\u00f3 gyermekek \u00e1tlagos magass\u00e1g\u00e1t\u00f3l. A hipot\u00e9zis tesztel\u00e9s\u00e9re a kutat\u00f3 k\u00e9tmint\u00e1s t-pr\u00f3b\u00e1t alkalmazhat. A t-pr\u00f3ba felt\u00e9telezi, hogy az alapul szolg\u00e1l\u00f3 adatok norm\u00e1lis eloszl\u00e1s\u00faak, \u00e9s hogy a k\u00e9t csoport sz\u00f3r\u00e1sa egyenl\u0151.<\/p>\n\n\n\n<p>A kutat\u00f3 kisz\u00e1m\u00edtja az egyes csoportok \u00e1tlagos magass\u00e1g\u00e1t, \u00e9s meg\u00e1llap\u00edtja, hogy az A csoport \u00e1tlagos magass\u00e1ga 150 cm, a B csoport \u00e1tlagos magass\u00e1ga pedig 155 cm. A kutat\u00f3 ezut\u00e1n kisz\u00e1m\u00edtja az egyes csoportok sz\u00f3r\u00e1s\u00e1t, \u00e9s meg\u00e1llap\u00edtja, hogy az A csoport sz\u00f3r\u00e1sa 5 cm, a B csoport\u00e9 pedig 4 cm.<\/p>\n\n\n\n<p>Ezut\u00e1n a kutat\u00f3 kisz\u00e1m\u00edtja a t-statisztik\u00e1t a k\u00e9t csoport \u00e1tlagainak k\u00fcl\u00f6nbs\u00e9g\u00e9t osztva a k\u00fcl\u00f6nbs\u00e9g standard hib\u00e1j\u00e1val. Ha a t-statisztika nagyobb, mint a szignifikanciaszint \u00e9s a szabads\u00e1gfokok \u00e1ltal meghat\u00e1rozott kritikus \u00e9rt\u00e9k, a kutat\u00f3 arra k\u00f6vetkeztethet, hogy az A \u00e9s a B csoportba tartoz\u00f3 gyermekek \u00e1tlagos magass\u00e1ga k\u00f6z\u00f6tt szignifik\u00e1ns k\u00fcl\u00f6nbs\u00e9g van.<\/p>\n\n\n\n<p>Ez a p\u00e9lda azt mutatja be, hogy a k\u00e9tmint\u00e1s t-pr\u00f3ba hogyan haszn\u00e1lhat\u00f3 a k\u00e9t csoport \u00e1tlagainak k\u00fcl\u00f6nbs\u00e9g\u00e9re vonatkoz\u00f3 hipot\u00e9zis tesztel\u00e9s\u00e9re. A t-pr\u00f3ba egy hat\u00e9kony \u00e9s sz\u00e9les k\u00f6rben haszn\u00e1lt parametrikus teszt, amely robusztus \u00e9s megb\u00edzhat\u00f3 m\u00f3dot biztos\u00edt a popul\u00e1ci\u00f3 \u00e1tlag\u00e1ra vonatkoz\u00f3 hipot\u00e9zisek tesztel\u00e9s\u00e9re.<\/p>\n\n\n\n<h2>Hat\u00e9kony eszk\u00f6z\u00f6k az adatok elemz\u00e9s\u00e9hez<\/h2>\n\n\n\n<p>\u00d6sszefoglalva, a parametrikus tesztek a statisztikai elemz\u00e9s hat\u00e9kony eszk\u00f6zei, amelyek robusztus \u00e9s megb\u00edzhat\u00f3 eredm\u00e9nyeket biztos\u00edtanak az alkalmaz\u00e1sok sz\u00e9les k\u00f6r\u00e9ben. Fontos azonban, hogy a megfelel\u0151 tesztet az adatok jellege \u00e9s a vizsg\u00e1lt kutat\u00e1si k\u00e9rd\u00e9s alapj\u00e1n v\u00e1lasszuk ki. Ak\u00e1r parametrikus, ak\u00e1r nem parametrikus teszteket haszn\u00e1lunk, a statisztikai elemz\u00e9s c\u00e9lja mindig az, hogy \u00e9rv\u00e9nyes k\u00f6vetkeztet\u00e9seket vonjunk le az alapul szolg\u00e1l\u00f3 sokas\u00e1gra vonatkoz\u00f3an, \u00e9s \u00e9rtelmes k\u00f6vetkeztet\u00e9seket vonjunk le az adatokb\u00f3l.<\/p>\n\n\n\n<h2>Semmi sem veri a hib\u00e1tlan vizu\u00e1lis alkot\u00e1st, amely komplex \u00fczenetet k\u00f6zvet\u00edt.<\/h2>\n\n\n\n<p>Neh\u00e9zs\u00e9gekbe \u00fctk\u00f6zik a nagy mennyis\u00e9g\u0171 inform\u00e1ci\u00f3 k\u00f6zl\u00e9se? Haszn\u00e1ljon infografik\u00e1kat \u00e9s illusztr\u00e1ci\u00f3kat, hogy \u00e9rthet\u0151bb\u00e9 \u00e9s hozz\u00e1f\u00e9rhet\u0151bb\u00e9 tegye munk\u00e1j\u00e1t. Az Mind the Graph kiv\u00e1l\u00f3 eszk\u00f6z azon kutat\u00f3k sz\u00e1m\u00e1ra, akik vizu\u00e1lisan vonz\u00f3 infografik\u00e1k haszn\u00e1lat\u00e1val szeretn\u00e9k hat\u00e9konyabb\u00e1 tenni munk\u00e1jukat.&nbsp;<\/p>\n\n\n\n<div style=\"height:18px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"600\" height=\"338\" src=\"https:\/\/mindthegraph.com\/blog\/wp-content\/uploads\/2022\/09\/3iezpf5xkd3.gif\" alt=\"\" class=\"wp-image-20197\"\/><\/figure><\/div>\n\n\n<div style=\"height:18px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"is-layout-flex wp-block-buttons\">\n<div class=\"wp-block-button aligncenter\"><a class=\"wp-block-button__link has-background wp-element-button\" href=\"https:\/\/mindthegraph.com\/\" style=\"border-radius:50px;background-color:#dc1866\" target=\"_blank\" rel=\"noreferrer noopener\">N\u00f6velje a kutat\u00e1som illusztr\u00e1ci\u00f3kkal<\/a><\/div>\n<\/div>\n\n\n\n<div style=\"height:44px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Ez a cikk seg\u00edt meg\u00e9rteni a statisztikai parametrikus teszteket, azok leggyakoribb t\u00edpusait, valamint azt, hogy hol \u00e9s mikor kell alkalmazni \u0151ket.<\/p>","protected":false},"author":4,"featured_media":26646,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[959,28],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What are statistics parametric tests and where to apply them?<\/title>\n<meta name=\"description\" content=\"This article will help you understand statistics parametric tests, their most common types, and also where and when to apply them.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mindthegraph.com\/blog\/hu\/statistics-parametric-tests\/\" \/>\n<meta property=\"og:locale\" content=\"hu_HU\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What are statistics parametric tests and where to apply them?\" \/>\n<meta property=\"og:description\" content=\"This article will help you understand statistics parametric tests, their most common types, and also where and when to apply them.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/mindthegraph.com\/blog\/hu\/statistics-parametric-tests\/\" \/>\n<meta property=\"og:site_name\" content=\"Mind the Graph Blog\" \/>\n<meta property=\"article:published_time\" content=\"2023-02-08T12:50:00+00:00\" \/>\n<meta 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