{"id":50519,"date":"2024-04-15T23:11:29","date_gmt":"2024-04-15T23:11:29","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=50519"},"modified":"2024-04-15T23:11:29","modified_gmt":"2024-04-15T23:11:29","slug":"how-can-we-best-represent-support-for-the-following-association-rule-if-x-and-y-then-z","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/how-can-we-best-represent-support-for-the-following-association-rule-if-x-and-y-then-z\/","title":{"rendered":"How can we best represent &#8216;support&#8217; for the following association rule: &#8220;If X and Y, then Z&#8221;."},"content":{"rendered":"<p>[amp_mcq option1=&#8221;$$\\frac{{{\\text{x}},{\\text{y}}}}{{{\\text{total number of transactions}}}}$$&#8221; option2=&#8221;$$\\frac{z}{{{\\text{total number of transactions}}}}$$&#8221; option3=&#8221;$$\\frac{z}{{{\\text{x,y}}}}$$&#8221; option4=&#8221;$$\\frac{{{\\text{x}},{\\text{y,}}\\,{\\text{z}}}}{{{\\text{total number of transactions}}}}$$&#8221; correct=&#8221;option3&#8243;]<!--more--><\/p>\n<p>The correct answer is $\\frac{{{\\text{x}},{\\text{y}}}}{{{\\text{total number of transactions}}}}$.<\/p>\n<p>Support is the percentage of transactions that contain both X and Y. It is calculated by dividing the number of transactions that contain both X and Y by the total number of transactions.<\/p>\n<p>For example, if there are 100 transactions and 20 of them contain both X and Y, then the support of the association rule &#8220;If X and Y, then Z&#8221; is $\\frac{20}{100} = 0.2$.<\/p>\n<p>The other options are incorrect because they do not represent the support of the association rule.<\/p>\n<p>Option A is the confidence of the association rule. It is calculated by dividing the number of transactions that contain both X and Y and Z by the number of transactions that contain X and Y.<\/p>\n<p>Option B is the lift of the association rule. It is calculated by dividing the confidence of the association rule by the support of the association rule.<\/p>\n<p>Option C is the specificity of the association rule. It is calculated by dividing the support of the association rule by the total number of transactions that contain Z.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[amp_mcq option1=&#8221;$$\\frac{{{\\text{x}},{\\text{y}}}}{{{\\text{total number of transactions}}}}$$&#8221; option2=&#8221;$$\\frac{z}{{{\\text{total number of transactions}}}}$$&#8221; option3=&#8221;$$\\frac{z}{{{\\text{x,y}}}}$$&#8221; option4=&#8221;$$\\frac{{{\\text{x}},{\\text{y,}}\\,{\\text{z}}}}{{{\\text{total number of transactions}}}}$$&#8221; correct=&#8221;option3&#8243;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[729],"tags":[],"class_list":["post-50519","post","type-post","status-publish","format-standard","hentry","category-machine-learning","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How can we best represent &#039;support&#039; for the following association rule: &quot;If X and Y, then Z&quot;.<\/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:\/\/exam.pscnotes.com\/mcq\/how-can-we-best-represent-support-for-the-following-association-rule-if-x-and-y-then-z\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How can we best represent &#039;support&#039; for the following association rule: &quot;If X and Y, then Z&quot;.\" \/>\n<meta property=\"og:description\" content=\"[amp_mcq option1=&#8221;$$frac{{{text{x}},{text{y}}}}{{{text{total number of transactions}}}}$$&#8221; option2=&#8221;$$frac{z}{{{text{total number of transactions}}}}$$&#8221; option3=&#8221;$$frac{z}{{{text{x,y}}}}$$&#8221; option4=&#8221;$$frac{{{text{x}},{text{y,}},{text{z}}}}{{{text{total number of transactions}}}}$$&#8221; correct=&#8221;option3&#8243;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/how-can-we-best-represent-support-for-the-following-association-rule-if-x-and-y-then-z\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2024-04-15T23:11:29+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"How can we best represent 'support' for the following association rule: \"If X and Y, then Z\".","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/how-can-we-best-represent-support-for-the-following-association-rule-if-x-and-y-then-z\/","og_locale":"en_US","og_type":"article","og_title":"How can we best represent 'support' for the following association rule: \"If X and Y, then Z\".","og_description":"[amp_mcq option1=&#8221;$$frac{{{text{x}},{text{y}}}}{{{text{total number of transactions}}}}$$&#8221; 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