{"id":1305,"date":"2018-03-27T18:31:00","date_gmt":"2018-03-27T22:31:00","guid":{"rendered":"https:\/\/www.adhoc-recherche.com\/?p=1305"},"modified":"2022-05-24T18:31:46","modified_gmt":"2022-05-24T22:31:46","slug":"la-ponderation-logique-ou-sorcellerie","status":"publish","type":"post","link":"https:\/\/www.adhoc-recherche.com\/en\/la-ponderation-logique-ou-sorcellerie\/","title":{"rendered":"LA POND\u00c9RATION : LOGIQUE OU SORCELLERIE?"},"content":{"rendered":"<p class=\"wp-block-paragraph\" style=\"font-size:13px\">Est-ce que les r\u00e9sultats de cette \u00e9tude ont \u00e9t\u00e9 pond\u00e9r\u00e9s? Voil\u00e0 une question qui revient fr\u00e9quemment sur le tapis. Si vous en doutiez, la pond\u00e9ration repr\u00e9sente une \u00e9tape essentielle de la recherche. Mais que veut-on vraiment dire par pond\u00e9rer les r\u00e9sultats?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:13px\">De mani\u00e8re g\u00e9n\u00e9rale, on songe \u00e0 la pond\u00e9ration d\u00e8s le d\u00e9but d\u2019une recherche, soit lorsqu\u2019on d\u00e9finit la population \u00e0 l\u2019\u00e9tude ainsi que le nombre et les caract\u00e9ristiques des r\u00e9pondants de l\u2019\u00e9chantillon. Prenons l\u2019exemple d\u2019une \u00e9tude sur la satisfaction envers une cr\u00e8me antirides. Il apparait pertinent de se questionner a priori sur la n\u00e9cessit\u00e9 d\u2019avoir 50 % d\u2019hommes dans son \u00e9chantillon alors que la client\u00e8le de cette dite cr\u00e8me est constitu\u00e9e de 90 % de femmes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:13px\">Dans certains cas, &nbsp;malgr\u00e9 bien des efforts, on se retrouve a post\u00e9riori avec un \u00e9chantillon d\u00e9s\u00e9quilibr\u00e9 par rapport \u00e0 la population \u00e0 l\u2019\u00e9tude. M\u00eame en prenant bien soin de cibler plus de femmes que d\u2019hommes, il est possible que l\u2019\u00e9chantillon final soit compos\u00e9 de trop de femmes \u00e2g\u00e9es par rapport aux plus jeunes. L\u2019\u00e9chantillon est donc d\u00e9s\u00e9quilibr\u00e9 en termes d\u2019\u00e2ges par rapport \u00e0 la population (oui, oui la pr\u00e9vention des fines lignes commence jeune!). En pond\u00e9rant, on peut donner un poids math\u00e9matiquement plus l\u00e9ger aux r\u00e9sultats des plus \u00e2g\u00e9s et un plus lourd aux plus jeunes afin que l\u2019\u00e9chantillon revienne \u00e0 la normale, comme par magie!<img decoding=\"async\" src=\"https:\/\/www.adhoc-recherche.com\/app\/thirdparty\/phpthumb\/phpThumb.php?src=%2Fapp%2Fuploads%2Fimages%2Fblog%2Fponderation-25aba52ee0a244.jpg&amp;q=100&amp;w=615&amp;hash=041b872fd86133cda9794bcac54461b6\" alt=\"\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:13px\">Le sexe et l\u2019\u00e2ge repr\u00e9sentent des variables sociod\u00e9mographiques parmi d\u2019autres pour pond\u00e9rer les r\u00e9sultats. Le choix des variables de pond\u00e9ration d\u00e9pend principalement de leur impact sur les r\u00e9sultats de l\u2019\u00e9tude ainsi que leur disponibilit\u00e9. En effet, le type de peau apparait une variable de pond\u00e9ration int\u00e9ressante puisque cela&nbsp; aurait certainement un impact sur l\u2019\u00e9valuation de la cr\u00e8me, mais malheureusement Statistique Canada ne fournit pas la proportion des Canadiens ayant la peau de type mixte!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:13px\">Bref, la pond\u00e9ration n\u2019a rien de bien sorcier, malgr\u00e9 qu\u2019il y ait quelques \u00e9l\u00e9ments \u00e0 consid\u00e9rer pour ne pas jouer au chaman avec la pond\u00e9ration\u00a0:<\/p>\n\n\n\n<ul class=\"wp-block-list\" style=\"font-size:13px\"><li>Dans la mesure du possible, on tente g\u00e9n\u00e9ralement d\u2019avoir des poids le plus pr\u00e8s de 1 afin de limiter l\u2019impact r\u00e9el sur la marge d\u2019erreur;<\/li><li>On ne peut pas accorder \u00e0 un seul r\u00e9pondant le poids de 100 r\u00e9pondants sans que quelqu\u2019un quelque part ne hausse le sourcil. G\u00e9n\u00e9ralement, on tol\u00e8re un poids maximal de 3;<\/li><li>Lorsque les param\u00e8tres de la population \u00e0 l\u2019\u00e9tude ne sont pas connus, il peut \u00eatre plus prudent de ne pas pond\u00e9rer.<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:13px\">Ultimement, le but de l\u2019exercice est de s\u2019assurer que le profil de l\u2019\u00e9chantillon soit semblable \u00e0 celui de la population \u00e0 l\u2019\u00e9tude. Il faut que les r\u00e9sultats soient une bonne illustration de ce qu\u2019ils doivent repr\u00e9senter.<\/p>","protected":false},"excerpt":{"rendered":"<p>Est-ce que les r\u00e9sultats de cette \u00e9tude ont \u00e9t\u00e9 pond\u00e9r\u00e9s? Voil\u00e0 une question qui revient fr\u00e9quemment sur le tapis. Si vous en doutiez, la pond\u00e9ration repr\u00e9sente une \u00e9tape essentielle de la recherche. Mais que veut-on vraiment dire par pond\u00e9rer les r\u00e9sultats? De mani\u00e8re g\u00e9n\u00e9rale, on songe \u00e0 la pond\u00e9ration d\u00e8s le d\u00e9but d&rsquo;une recherche, soit lorsqu&rsquo;on d\u00e9finit la population \u00e0 l&rsquo;\u00e9tude ainsi que le nombre et les caract\u00e9ristiques des r\u00e9pondants de l&rsquo;\u00e9chantillon. Prenons l&rsquo;exemple d&rsquo;une \u00e9tude sur la satisfaction envers une cr\u00e8me antirides. Il apparait pertinent de se questionner a priori sur la n\u00e9cessit\u00e9 d&rsquo;avoir 50 % d&rsquo;hommes dans son \u00e9chantillon alors que la client\u00e8le de cette dite cr\u00e8me est constitu\u00e9e de 90 % de femmes.<\/p>","protected":false},"author":17,"featured_media":1306,"comment_status":"open","ping_status":"open","sticky":false,"template":"templates\/template-blog.php","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[20],"tags":[],"class_list":["post-1305","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-traitement-de-donnees"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>LA POND\u00c9RATION : LOGIQUE OU SORCELLERIE? - Ad Hoc Recherche<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.adhoc-recherche.com\/en\/la-ponderation-logique-ou-sorcellerie\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"LA POND\u00c9RATION : LOGIQUE OU SORCELLERIE? - Ad Hoc Recherche\" \/>\n<meta property=\"og:description\" content=\"Est-ce que les r\u00e9sultats de cette \u00e9tude ont \u00e9t\u00e9 pond\u00e9r\u00e9s? Voil\u00e0 une question qui revient fr\u00e9quemment sur le tapis. Si vous en doutiez, la pond\u00e9ration repr\u00e9sente une \u00e9tape essentielle de la recherche. Mais que veut-on vraiment dire par pond\u00e9rer les r\u00e9sultats? De mani\u00e8re g\u00e9n\u00e9rale, on songe \u00e0 la pond\u00e9ration d\u00e8s le d\u00e9but d&#039;une recherche, soit lorsqu&#039;on d\u00e9finit la population \u00e0 l&#039;\u00e9tude ainsi que le nombre et les caract\u00e9ristiques des r\u00e9pondants de l&#039;\u00e9chantillon. Prenons l&#039;exemple d&#039;une \u00e9tude sur la satisfaction envers une cr\u00e8me antirides. Il apparait pertinent de se questionner a priori sur la n\u00e9cessit\u00e9 d&#039;avoir 50 % d&#039;hommes dans son \u00e9chantillon alors que la client\u00e8le de cette dite cr\u00e8me est constitu\u00e9e de 90 % de femmes.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.adhoc-recherche.com\/en\/la-ponderation-logique-ou-sorcellerie\/\" \/>\n<meta property=\"og:site_name\" content=\"Ad Hoc Recherche\" \/>\n<meta property=\"article:published_time\" content=\"2018-03-27T22:31:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-05-24T22:31:46+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.adhoc-recherche.com\/wp-content\/uploads\/2022\/05\/bc9bde7dfe931044e599a983233a47ca1522160002_blogpost_thumb_blog.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"267\" \/>\n\t<meta property=\"og:image:height\" content=\"189\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Catherine Plourde\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Catherine Plourde\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.adhoc-recherche.com\\\/en\\\/la-ponderation-logique-ou-sorcellerie\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.adhoc-recherche.com\\\/en\\\/la-ponderation-logique-ou-sorcellerie\\\/\"},\"author\":{\"name\":\"Catherine Plourde\",\"@id\":\"https:\\\/\\\/www.adhoc-recherche.com\\\/en\\\/#\\\/schema\\\/person\\\/a9db10d99f9b0c9a59a9bf96c230c8db\"},\"headline\":\"LA POND\u00c9RATION : LOGIQUE OU SORCELLERIE?\",\"datePublished\":\"2018-03-27T22:31:00+00:00\",\"dateModified\":\"2022-05-24T22:31:46+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.adhoc-recherche.com\\\/en\\\/la-ponderation-logique-ou-sorcellerie\\\/\"},\"wordCount\":516,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.adhoc-recherche.com\\\/en\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.adhoc-recherche.com\\\/en\\\/la-ponderation-logique-ou-sorcellerie\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.adhoc-recherche.com\\\/wp-content\\\/uploads\\\/2022\\\/05\\\/bc9bde7dfe931044e599a983233a47ca1522160002_blogpost_thumb_blog.jpg\",\"articleSection\":[\"Traitement de donn\u00e9es\"],\"inLanguage\":\"en-CA\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.adhoc-recherche.com\\\/en\\\/la-ponderation-logique-ou-sorcellerie\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.adhoc-recherche.com\\\/en\\\/la-ponderation-logique-ou-sorcellerie\\\/\",\"url\":\"https:\\\/\\\/www.adhoc-recherche.com\\\/en\\\/la-ponderation-logique-ou-sorcellerie\\\/\",\"name\":\"LA POND\u00c9RATION : LOGIQUE OU SORCELLERIE? 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Voil\u00e0 une question qui revient fr\u00e9quemment sur le tapis. Si vous en doutiez, la pond\u00e9ration repr\u00e9sente une \u00e9tape essentielle de la recherche. Mais que veut-on vraiment dire par pond\u00e9rer les r\u00e9sultats? De mani\u00e8re g\u00e9n\u00e9rale, on songe \u00e0 la pond\u00e9ration d\u00e8s le d\u00e9but d'une recherche, soit lorsqu'on d\u00e9finit la population \u00e0 l'\u00e9tude ainsi que le nombre et les caract\u00e9ristiques des r\u00e9pondants de l'\u00e9chantillon. Prenons l'exemple d'une \u00e9tude sur la satisfaction envers une cr\u00e8me antirides. 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