{"id":1721,"date":"2012-05-01T21:58:38","date_gmt":"2012-05-01T20:58:38","guid":{"rendered":"https:\/\/abcdr.guyader.pro\/?p=1721"},"modified":"2020-05-23T18:38:18","modified_gmt":"2020-05-23T17:38:18","slug":"comment-realiser-un-test-du-khi%c2%b2-avec-r-chisq-test","status":"publish","type":"post","link":"https:\/\/thinkr.fr\/abcdr\/comment-realiser-un-test-du-khi%c2%b2-avec-r-chisq-test\/","title":{"rendered":"Comment r\u00e9aliser un test du khi\u00b2 avec R ? : chisq.test"},"content":{"rendered":"<p>R int\u00e9gre e natif tout ce qu&rsquo;il faut pour r\u00e9aliser un test de khi2 vous pouvez utilser la fonction <strong>chisq.test<\/strong><br \/>Prenons un cas courant de comparaison de deux variables qualitative : on veut savoir s&rsquo;il existe une diff\u00e9rence d&rsquo;incidence dans un groupe donn\u00e9e entre les hommes et le femmes pour une maladie donn\u00e9e.<\/p>\n<p>50 hommes dont 15 malades<br \/>70 femmes dont 20 malades<\/p>\n<pre lang='rsplus'><br \/> mat&lt;-matrix(c(15,35,20,50), 2, 2, byrow=TRUE) <br \/>chisq.test(mat)<br \/><\/code><\/pre>\n<p>dans le cas pr\u00e9sent on a une p.value de 0,97, on ne peut donc vraiment pas rejeter l&rsquo;hypothese d&rsquo;equivalence entre les hommes et les femmes.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>R int\u00e9gre e natif tout ce qu&rsquo;il faut pour r\u00e9aliser un test de khi2 vous pouvez utilser la fonction chisq.testPrenons un cas courant de comparaison de deux variables qualitative : on veut savoir s&rsquo;il existe une diff\u00e9rence d&rsquo;incidence dans un groupe donn\u00e9e entre les hommes et le femmes pour une maladie donn\u00e9e. 50 hommes dont 15 malades70 femmes dont 20 malades mat&lt;-matrix(c(15,35,20,50), 2, 2, byrow=TRUE) chisq.test(mat) dans le cas pr\u00e9sent on a une p.value de 0,97, on ne peut donc vraiment pas rejeter l&rsquo;hypothese d&rsquo;equivalence entre les hommes et les femmes.<a class=\"more-link\" href=\"https:\/\/thinkr.fr\/abcdr\/comment-realiser-un-test-du-khi%c2%b2-avec-r-chisq-test\/\">Read More &rarr;<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","rop_custom_images_group":[],"rop_custom_messages_group":[],"rop_publish_now":"initial","rop_publish_now_accounts":{"twitter_399453572_399453572":""},"rop_publish_now_history":[],"rop_publish_now_status":"pending","jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[21],"tags":[],"class_list":{"0":"entry","1":"post","2":"publish","3":"author-vincent","4":"post-1721","6":"format-standard","7":"category-test"},"acf":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p9O7Sx-rL","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/posts\/1721","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/comments?post=1721"}],"version-history":[{"count":48,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/posts\/1721\/revisions"}],"predecessor-version":[{"id":4770,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/posts\/1721\/revisions\/4770"}],"wp:attachment":[{"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/media?parent=1721"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/categories?post=1721"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/tags?post=1721"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}