{"id":24713,"date":"2022-11-01T06:04:31","date_gmt":"2022-11-01T06:04:31","guid":{"rendered":"https:\/\/analystprep.com\/cfa-level-1-exam\/?p=24713"},"modified":"2026-08-05T16:14:17","modified_gmt":"2026-08-05T16:14:17","slug":"data-organization-for-quantitative-analysis","status":"publish","type":"post","link":"https:\/\/analystprep.com\/cfa-level-1-exam\/quantitative-methods\/data-organization-for-quantitative-analysis\/","title":{"rendered":"Data Organization for Quantitative Analysis"},"content":{"rendered":"\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"ImageObject\",\n  \"url\": \"https:\/\/analystprep.com\/cfa-level-1-exam\/wp-content\/uploads\/2021\/08\/Img_1.png\",\n  \"caption\": \"Data Table\",\n  \"width\": 1590,\n  \"height\": 1057,\n  \"copyrightNotice\": \"\u00a9 2024 AnalystPrep\",\n  \"acquireLicensePage\": \"https:\/\/analystprep.com\/license-info\",\n  \"creditText\": \"AnalystPrep Design Team\",\n  \"creator\": {\n    \"@type\": \"Organization\",\n    \"name\": \"AnalystPrep\"\n  }\n}\n<\/script>\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"QAPage\",\n  \"mainEntity\": {\n    \"@type\": \"Question\",\n    \"name\": \"Which of the following statements is most likely correct? A two-dimensional array is:\",\n    \"text\": \"Options:\\nA. Most suitable for organizing raw panel data.\\nB. Suitable for organizing raw time-series data of a single variable.\\nC. Appropriate for organizing raw cross-sectional data.\",\n    \"answerCount\": 1,\n    \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"The correct answer is A. A two-dimensional array is most suitable for organizing raw panel data because panel data combines time-series and cross-sectional observations. It uses rows to represent observations over time and columns to represent variables or observational units. Option B is incorrect because a one-dimensional array is suitable for organizing time-series data of a single variable. Option C is incorrect because a one-dimensional array is also suitable for organizing raw cross-sectional data.\"\n    }\n  }\n}\n<\/script>\n\n\n\n<p class=\"wp-block-paragraph\"><iframe loading=\"lazy\" src=\"\/\/www.youtube.com\/embed\/XCKuqfoNqOo\" width=\"611\" height=\"343\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Typically, raw data can be organized into the following two formats for quantitative analysis:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>One-dimensional array<\/strong>: A one-dimensional array is the simplest format for representing a single variable, such as the daily trading volume of the stock exchange.<\/li>\n\n\n\n<li><strong>Two-dimensional rectangular array<\/strong>: A two-dimensional rectangular array (also called a data table) is a format that consists of columns and rows for representing multiple variables and multiple observations.\u00a0 The image below is an example:<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"1590\" height=\"1057\" src=\"https:\/\/analystprep.com\/cfa-level-1-exam\/wp-content\/uploads\/2021\/08\/Img_1.png\" alt=\"\" class=\"wp-image-31034\" srcset=\"https:\/\/analystprep.com\/cfa-level-1-exam\/wp-content\/uploads\/2021\/08\/Img_1.png 1590w, https:\/\/analystprep.com\/cfa-level-1-exam\/wp-content\/uploads\/2021\/08\/Img_1-300x199.png 300w, https:\/\/analystprep.com\/cfa-level-1-exam\/wp-content\/uploads\/2021\/08\/Img_1-1024x681.png 1024w, https:\/\/analystprep.com\/cfa-level-1-exam\/wp-content\/uploads\/2021\/08\/Img_1-768x511.png 768w, https:\/\/analystprep.com\/cfa-level-1-exam\/wp-content\/uploads\/2021\/08\/Img_1-1536x1021.png 1536w, https:\/\/analystprep.com\/cfa-level-1-exam\/wp-content\/uploads\/2021\/08\/Img_1-400x266.png 400w\" sizes=\"auto, (max-width: 1590px) 100vw, 1590px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<div style=\"margin: 18px 0;\"><a style=\"display: block; text-align: center; padding: 14px 18px; border: 2px solid #2F5BFF; border-radius: 18px; color: #ffffff; font-weight: 600; font-size: 16px; text-decoration: none; background-color: #1a73e8;\" href=\"https:\/\/analystprep.com\/free-trial\/\" target=\"_blank\" rel=\"noopener noreferrer\">Master frequency distributions with AnalystPrep\u2019s Free Trial.<\/a><\/div>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Example: One-dimensional Array and Two-dimensional Array<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Refer to the following two arrays and identify the one which is one-dimensional and the other which is two-dimensional.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">$$\\begin{array}{}\\textbf{Array 1}\\end{array}$$<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">$$\\begin{array}{l|c|c|c|c} \\textbf{Year}&amp;\\textbf{2017}&amp;\\textbf{2018}&amp;\\textbf{2019}&amp;\\textbf{2020}\\\\ \\hline \\text{Closing price of}&amp;5.7&amp;5.22&amp;5.13&amp;5.17\\\\ \\text{stock (in USD)}&amp;{}&amp;{}&amp;{}&amp;{}\\\\ \\end{array}$$<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">$$\\begin{array}{}\\textbf{Array 2}\\end{array}$$<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">$$<br>\n\\begin{aligned}<br>\n&amp;\\textbf { Fertilizer Sector Profit after Tax (PKR MN) } \\\\<br>\n&amp;\\begin{array}{c|c|c}<br>\n\\textbf { Company } &amp; \\textbf { 2QFY21 } &amp; \\textbf { 2QFY22 } \\\\<br>\n\\hline \\text { A } &amp; 2,315 &amp; 981 \\\\<br>\n\\hline \\text { B } &amp; 2,478 &amp; 272 \\\\<br>\n\\hline \\text { C } &amp; 820 &amp; 222 \\\\<br>\n\\hline \\text { D } &amp; 965 &amp; 10 \\\\<br>\n\\end{array}<br>\n\\end{aligned}<br>\n$$<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Solution<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Array 1 represents a one-dimensional array, while Array 2 represents a two-dimensional array.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Question<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><span data-preserver-spaces=\"true\">Which of the following statements is&nbsp;<\/span><em><span data-preserver-spaces=\"true\">most likely&nbsp;<\/span><\/em><span data-preserver-spaces=\"true\">correct? <\/span><span data-preserver-spaces=\"true\">A two-dimensional array is:<\/span><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><span data-preserver-spaces=\"true\">Most suitable for organizing raw panel data.<\/span><\/li>\n\n\n\n<li><span data-preserver-spaces=\"true\">Suitable for organizing raw time-series data of a single variable.<\/span><\/li>\n\n\n\n<li><span data-preserver-spaces=\"true\">Appropriate for organizing raw cross-sectional data.<\/span><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><span data-preserver-spaces=\"true\">Solution<\/span><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span data-preserver-spaces=\"true\">The correct answer is <strong>A<\/strong>.<\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span data-preserver-spaces=\"true\">Remember that panel data consist of observations made on one or more variables for multiple observational units. In other words, panel data is a combination of time series data and cross-sectional data. <\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span data-preserver-spaces=\"true\">Therefore, a two-dimensional array would be suitable for organizing panel data. This is because it consists of columns to accommodate <\/span><span data-preserver-spaces=\"true\">variable(s) for the observational units and rows that accommodate the observations made through time.<\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><span data-preserver-spaces=\"true\">B is incorrect<\/span><\/strong>. <span data-preserver-spaces=\"true\">A one-dimensional array is suitable for organizing time-series data of a single variable.<\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><span data-preserver-spaces=\"true\">C is incorrect<\/span><\/strong>.<span data-preserver-spaces=\"true\"> A one-dimensional array is suitable for organizing cross-sectional data.<\/span><\/p>\n<\/blockquote>\n\n\n\n<div style=\"text-align: center; margin: 30px 0;\"><a style=\"display: inline-flex; align-items: center; justify-content: center; padding: 12px 26px; border-radius: 9999px; background: #1e5bd8; color: #ffffff; font-weight: bold; text-decoration: none;\" href=\"https:\/\/analystprep.com\/free-trial\/\" target=\"_blank\" rel=\"noopener noreferrer\">Start Free Trial \u2192<\/a> <p style=\"margin-top: 12px; font-size: 16px; line-height: 1.5;\">Strengthen your understanding of summarizing data using frequency distributions, organizing datasets, and interpreting quantitative information with CFA Level I study notes, practice questions, and mock exams.<\/p>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Typically, raw data can be organized into the following two formats for quantitative analysis: Master frequency distributions with AnalystPrep\u2019s Free Trial. Example: One-dimensional Array and Two-dimensional Array Refer to the following two arrays and identify the one which is one-dimensional&#8230;<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-24713","post","type-post","status-publish","format-standard","hentry","category-quantitative-methods","blog-post","no-post-thumbnail","animate"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Data Organization in Quantitative Analysis | CFA Level 1<\/title>\n<meta name=\"description\" content=\"Learn how raw data is structured for quantitative analysis using one-dimensional arrays and two-dimensional rectangular arrays (data tables).\" \/>\n<meta name=\"robots\" content=\"index, follow, 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