{"id":277,"date":"2026-06-22T06:37:42","date_gmt":"2026-06-22T06:37:42","guid":{"rendered":"http:\/\/tutor-lms-demo.com\/courses\/data-science-foundations\/lessons\/handling-missing-data\/"},"modified":"2026-06-22T06:37:42","modified_gmt":"2026-06-22T06:37:42","slug":"handling-missing-data","status":"publish","type":"lesson","link":"https:\/\/website.uia.ac.cr\/en\/courses\/data-science-foundations\/lessons\/handling-missing-data\/","title":{"rendered":"Handling Missing Data"},"content":{"rendered":"<p>Real-world datasets are rarely perfect. Common issues include:<\/p>\n<ul>\n<li>Missing values<\/li>\n<li>Duplicate records<\/li>\n<li>Inconsistent formats<\/li>\n<li>Incorrect entries<\/li>\n<\/ul>\n<p>Pandas provides tools such as:<\/p>\n<pre><code>df.isnull()\ndf.dropna()\ndf.fillna()<\/code><\/pre>\n<p>Data cleaning is often the most time-consuming stage of a project. Clean data leads to more accurate analysis and reliable conclusions.<\/p>","protected":false},"comment_status":"open","ping_status":"closed","template":"","class_list":["post-277","lesson","type-lesson","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Handling Missing Data - Website UIA<\/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:\/\/website.uia.ac.cr\/en\/courses\/data-science-foundations\/lessons\/handling-missing-data\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Handling Missing Data - Website UIA\" \/>\n<meta property=\"og:description\" content=\"Real-world datasets are rarely perfect. Common issues include: Missing values Duplicate records Inconsistent formats Incorrect entries Pandas provides tools such as: df.isnull() df.dropna() df.fillna() Data cleaning is often the most time-consuming stage of a project. Clean data leads to more accurate analysis and reliable conclusions.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/website.uia.ac.cr\/en\/courses\/data-science-foundations\/lessons\/handling-missing-data\/\" \/>\n<meta property=\"og:site_name\" content=\"Website UIA\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/website.uia.ac.cr\\\/courses\\\/data-science-foundations\\\/lessons\\\/handling-missing-data\\\/\",\"url\":\"https:\\\/\\\/website.uia.ac.cr\\\/courses\\\/data-science-foundations\\\/lessons\\\/handling-missing-data\\\/\",\"name\":\"Handling Missing Data - Website UIA\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/website.uia.ac.cr\\\/#website\"},\"datePublished\":\"2026-06-22T06:37:42+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/website.uia.ac.cr\\\/courses\\\/data-science-foundations\\\/lessons\\\/handling-missing-data\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/website.uia.ac.cr\\\/courses\\\/data-science-foundations\\\/lessons\\\/handling-missing-data\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/website.uia.ac.cr\\\/courses\\\/data-science-foundations\\\/lessons\\\/handling-missing-data\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Inicio\",\"item\":\"https:\\\/\\\/website.uia.ac.cr\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Lecciones\",\"item\":\"https:\\\/\\\/website.uia.ac.cr\\\/lesson\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Handling Missing Data\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/website.uia.ac.cr\\\/#website\",\"url\":\"https:\\\/\\\/website.uia.ac.cr\\\/\",\"name\":\"Website UIA\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/website.uia.ac.cr\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/website.uia.ac.cr\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/website.uia.ac.cr\\\/#organization\",\"name\":\"Website UIA\",\"url\":\"https:\\\/\\\/website.uia.ac.cr\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/website.uia.ac.cr\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/website.uia.ac.cr\\\/wp-content\\\/uploads\\\/2026\\\/07\\\/uia-logotipo600x400.png\",\"contentUrl\":\"https:\\\/\\\/website.uia.ac.cr\\\/wp-content\\\/uploads\\\/2026\\\/07\\\/uia-logotipo600x400.png\",\"width\":602,\"height\":411,\"caption\":\"Website UIA\"},\"image\":{\"@id\":\"https:\\\/\\\/website.uia.ac.cr\\\/#\\\/schema\\\/logo\\\/image\\\/\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Handling Missing Data - Website UIA","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:\/\/website.uia.ac.cr\/en\/courses\/data-science-foundations\/lessons\/handling-missing-data\/","og_locale":"en_US","og_type":"article","og_title":"Handling Missing Data - Website UIA","og_description":"Real-world datasets are rarely perfect. 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