

{"id":443467,"date":"2022-10-27T04:04:11","date_gmt":"2022-10-27T11:04:11","guid":{"rendered":"https:\/\/www.questionpro.com\/blog\/?p=443467"},"modified":"2022-12-21T16:54:07","modified_gmt":"2022-12-21T16:54:07","slug":"correlation-analysis","status":"publish","type":"post","link":"https:\/\/www.questionpro.com\/blog\/fr\/correlation-analysis\/","title":{"rendered":"Analyse de corr\u00e9lation &#8211; Utilisation de l\u2019analyse de corr\u00e9lation pour d\u00e9terminer les relations lin\u00e9aires entre deux variables"},"content":{"rendered":"<h1>Analyse de corr\u00e9lation &#8211; Utilisation de l\u2019analyse de corr\u00e9lation pour d\u00e9terminer les relations lin\u00e9aires entre deux variables<\/h1>\n<h2 class=\"ft-macro-main-title\"><span>Qu&rsquo;est-ce que l&rsquo;analyse de corr\u00e9lation ?<\/span><\/h2>\n<p class=\"ft-macro-description\"><span>L&rsquo;analyse de corr\u00e9lation dans la recherche est une m\u00e9thode statistique utilis\u00e9e pour mesurer la force de la relation lin\u00e9aire entre deux variables et calculer leur association.&nbsp;En termes simples, l&rsquo;analyse de corr\u00e9lation calcule le niveau de changement d&rsquo;une variable en raison du changement de l&rsquo;autre.&nbsp;Une forte corr\u00e9lation indique une forte relation entre les deux variables, tandis qu&rsquo;une faible corr\u00e9lation signifie que les variables sont faiblement li\u00e9es.<\/span><\/p>\n<p><span>En ce qui concerne les \u00e9tudes de march\u00e9, les chercheurs utilisent l&rsquo;analyse de corr\u00e9lation pour analyser les donn\u00e9es quantitatives collect\u00e9es par le biais de m\u00e9thodes de recherche telles que les enqu\u00eates et les sondages en direct.&nbsp;Ils essaient d&rsquo;identifier la relation, les mod\u00e8les, les liens significatifs et les tendances entre deux variables ou ensembles de donn\u00e9es.<\/span><\/p>\n<p><span>Il existe une corr\u00e9lation positive entre deux variables lorsqu&rsquo;une augmentation d&rsquo;une variable entra\u00eene l&rsquo;augmentation de l&rsquo;autre.&nbsp;D&rsquo;autre part, une corr\u00e9lation n\u00e9gative signifie que lorsqu&rsquo;une variable augmente, l&rsquo;autre diminue et vice-versa.<\/span><\/p>\n<h3 class=\"ft-macro-main-title\"><span>Le coefficient de corr\u00e9lation<\/span><\/h3>\n<p class=\"ft-macro-description\"><span>L&rsquo;un des concepts statistiques les plus li\u00e9s \u00e0 ce type d&rsquo;analyse est le coefficient de corr\u00e9lation.<\/span><\/p>\n<p class=\"ft-macro-description\"><span>Le coefficient de corr\u00e9lation est l&rsquo;unit\u00e9 de mesure utilis\u00e9e pour calculer l&rsquo;intensit\u00e9 de la relation lin\u00e9aire entre les variables impliqu\u00e9es dans une analyse de corr\u00e9lation, ceci est facilement identifiable car il est repr\u00e9sent\u00e9 par le symbole r et est g\u00e9n\u00e9ralement une valeur sans unit\u00e9 qui se situe entre 1 et 1.<\/span><\/p>\n<p class=\"ft-macro-description\"><span>Si vous souhaitez approfondir ce sujet, nous vous conseillons de consulter notre guide :&nbsp;<\/span><a href=\"https:\/\/www.questionpro.com\/blog\/pearson-correlation-coefficient\/\"><span>Coefficient de corr\u00e9lation de Pearson<\/span><\/a><span>&nbsp;.<\/span><\/p>\n<h3 class=\"ft-macro-main-title\"><span>Exemple d&rsquo;analyse de corr\u00e9lation<\/span><\/h3>\n<p class=\"ft-macro-description\"><span>La corr\u00e9lation entre deux variables peut \u00eatre une corr\u00e9lation positive, une corr\u00e9lation n\u00e9gative ou aucune corr\u00e9lation.&nbsp;Examinons des exemples de chacun de ces trois types&nbsp;:<\/span><\/p>\n<ul class=\"ft-macro-select-option-list\">\n<li><b><span>Corr\u00e9lation positive<\/span><\/b><span>&nbsp;: Une corr\u00e9lation positive entre deux variables signifie que les deux variables \u00e9voluent dans la m\u00eame direction.&nbsp;Une augmentation d&rsquo;une variable entra\u00eene une augmentation de l&rsquo;autre variable et vice versa.<\/span><br \/>\n<span>Par exemple, passer plus de temps sur un tapis roulant br\u00fble plus de calories.<\/span><\/li>\n<li><b><span>Corr\u00e9lation n\u00e9gative<\/span><\/b><span>&nbsp;: Une corr\u00e9lation n\u00e9gative entre deux variables signifie que les variables \u00e9voluent dans des directions oppos\u00e9es.&nbsp;Une augmentation d&rsquo;une variable entra\u00eene une diminution de l&rsquo;autre variable et vice versa.<\/span><br \/>\n<span>Par exemple, augmenter la vitesse d&rsquo;un v\u00e9hicule diminue le temps que vous mettez pour atteindre votre destination.<\/span><\/li>\n<li><b><span>Corr\u00e9lation faible\/z\u00e9ro<\/span><\/b><span>&nbsp;: Aucune corr\u00e9lation n&rsquo;existe lorsqu&rsquo;une variable n&rsquo;affecte pas l&rsquo;autre.<\/span><br \/>\n<span>Par exemple, il n&rsquo;y a pas de corr\u00e9lation entre le nombre d&rsquo;ann\u00e9es d&rsquo;\u00e9tudes qu&rsquo;une personne a fr\u00e9quent\u00e9es et les lettres de son nom.<\/span><\/li>\n<\/ul>\n<p><img decoding=\"async\" class=\"ft-macro-fulwidth-img lazyloaded\" src=\"https:\/\/cdn.questionpro.com\/userimages\/site_media\/Correlation.jpg\" alt=\"Analyse de corr\u00e9lation\" data-src=\"https:\/\/cdn.questionpro.com\/userimages\/site_media\/Correlation.jpg\"><\/p>\n<h3 class=\"ft-macro-main-title\"><span>Utilisations de l&rsquo;analyse de corr\u00e9lation<\/span><\/h3>\n<p class=\"ft-macro-description\"><span>L&rsquo;analyse de corr\u00e9lation est utilis\u00e9e pour \u00e9tudier des cas pratiques.&nbsp;Ici, le chercheur ne peut pas manipuler les variables individuelles.&nbsp;Par exemple, l&rsquo;analyse de corr\u00e9lation est utilis\u00e9e pour mesurer la corr\u00e9lation entre la tension art\u00e9rielle du patient et le m\u00e9dicament utilis\u00e9.<\/span><\/p>\n<p class=\"ft-macro-description\"><span>Les sp\u00e9cialistes du marketing l&rsquo;utilisent pour mesurer l&rsquo;efficacit\u00e9 de la publicit\u00e9.&nbsp;Les chercheurs mesurent l&rsquo;augmentation\/diminution des ventes due \u00e0 une campagne marketing sp\u00e9cifique.<\/span><\/p>\n<h3 class=\"ft-macro-main-title\"><span>Avantages de l&rsquo;analyse de corr\u00e9lation<\/span><\/h3>\n<p class=\"ft-macro-description\"><span>En statistique, la corr\u00e9lation fait r\u00e9f\u00e9rence au fait qu&rsquo;il existe un lien entre divers \u00e9v\u00e9nements.&nbsp;L&rsquo;un des outils pour d\u00e9duire si un tel lien existe est l&rsquo;analyse de corr\u00e9lation.&nbsp;La simplicit\u00e9 pratique est sans aucun doute l&rsquo;un de ses principaux avantages.<\/span><\/p>\n<p class=\"ft-macro-description\"><span>Pour effectuer une analyse de corr\u00e9lation fiable, il est essentiel de faire des observations approfondies de deux variables, ce qui nous donne un avantage dans l&rsquo;obtention de r\u00e9sultats.&nbsp;Certains des avantages les plus notoires de l&rsquo;analyse de corr\u00e9lation sont :<\/span><\/p>\n<ul class=\"ft-macro-select-option-list\">\n<li><span>Conscience du comportement entre deux variables : Une corr\u00e9lation permet d&rsquo;identifier l&rsquo;absence ou la pr\u00e9sence d&rsquo;une relation entre deux variables.&nbsp;Il a tendance \u00e0 \u00eatre plus pertinent pour la vie quotidienne.<\/span><\/li>\n<li><span>Un bon point de d\u00e9part pour la recherche : Cela s&rsquo;av\u00e8re \u00eatre un bon point de d\u00e9part lorsqu&rsquo;un chercheur commence \u00e0 enqu\u00eater sur les relations pour la premi\u00e8re fois.<\/span><\/li>\n<li><span>Utilisations pour d&rsquo;autres \u00e9tudes : Les chercheurs peuvent identifier la direction et la force de la relation entre deux variables et ensuite affiner les r\u00e9sultats dans des \u00e9tudes ult\u00e9rieures.<\/span><\/li>\n<li><span>Mesures simples : Les r\u00e9sultats de la recherche sont simples \u00e0 classer.&nbsp;Les r\u00e9sultats peuvent varier de -1,00 \u00e0 1,00.&nbsp;Il ne peut y avoir que trois grands r\u00e9sultats potentiels de l&rsquo;analyse.<\/span><\/li>\n<\/ul>\n<h3 class=\"ft-macro-main-title\"><span>Comment utiliser l&rsquo;analyse de corr\u00e9lation dans vos enqu\u00eates ?<\/span><\/h3>\n<p class=\"ft-macro-description\"><span>D\u00e9couvrez comment configurer et utiliser cette fonctionnalit\u00e9 gr\u00e2ce \u00e0 notre&nbsp;<\/span><a class=\"ft-anchor-link-macro\" href=\"https:\/\/www.questionpro.com\/help\/correlation-analysis-spearman-rho.html\"><span>fichier d&rsquo;aide sur l&rsquo;analyse de corr\u00e9lation.<\/span><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Analyse de corr\u00e9lation &#8211; Utilisation de l\u2019analyse de corr\u00e9lation pour d\u00e9terminer les relations lin\u00e9aires entre deux variables Qu&rsquo;est-ce que l&rsquo;analyse [&hellip;]<\/p>\n","protected":false},"author":39,"featured_media":389944,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[198],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Analyse de corr\u00e9lation - Utilisation de l\u2019analyse de corr\u00e9lation pour d\u00e9terminer les relations lin\u00e9aires entre deux variables | QuestionPro<\/title>\n<meta name=\"description\" content=\"Utilisez l\u2019analyse de corr\u00e9lation dans votre \u00e9tude de recherche pour comprendre la corr\u00e9lation entre deux variables \u2014 la corr\u00e9lation n\u00e9gative ou positive pour prendre des 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