{"id":41328,"date":"2025-10-14T14:05:49","date_gmt":"2025-10-14T14:05:49","guid":{"rendered":"https:\/\/certifeka-edu.com\/programs\/research-for-strategic-development-professional-certificate-2\/lessons\/lesson-3-some-common-statistical-tests-used-in-descriptive-statistics-2\/"},"modified":"2025-10-14T14:05:49","modified_gmt":"2025-10-14T14:05:49","slug":"lesson-3-some-common-statistical-tests-used-in-descriptive-statistics-2","status":"publish","type":"lesson","link":"https:\/\/certifeka-edu.com\/ar\/programs\/sample-course\/lessons\/lesson-3-some-common-statistical-tests-used-in-descriptive-statistics-2\/","title":{"rendered":"Lesson 3: Some common statistical tests used in descriptive statistics"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" width=\"96\" height=\"114\" src=\"https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/04\/logos-png-01-296x57-1.png\" alt=\"\" srcset=\"https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/04\/logos-png-01-296x57-1.png 96w, https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/04\/logos-png-01-296x57-1-10x12.png 10w, https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/04\/logos-png-01-296x57-1-42x50.png 42w\" sizes=\"auto, (max-width: 96px) 100vw, 96px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/p>\n<h2>Lesson 3: Data interpretation<br \/>\n<\/h2>\n<h3>Some common statistical tests used in descriptive statistics:<br \/>\n<\/h3>\n<p>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"465\" height=\"321\" src=\"https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Tbale.png\" alt=\"\" srcset=\"https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Tbale.png 465w, https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Tbale-300x207.png 300w, https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Tbale-18x12.png 18w, https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Tbale-72x50.png 72w\" sizes=\"auto, (max-width: 465px) 100vw, 465px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/p>\n<h5>Mean &#8212; this is simply the mathematical average of a range of numbers.<\/h5>\n<p>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"511\" height=\"263\" src=\"https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Table2-2.png\" alt=\"\" srcset=\"https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Table2-2.png 511w, https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Table2-2-300x154.png 300w, https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Table2-2-18x9.png 18w, https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Table2-2-97x50.png 97w\" sizes=\"auto, (max-width: 511px) 100vw, 511px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/p>\n<h5>Median &#8212; this is the midpoint in a range of numbers when the numbers are arranged in numerical order.<\/h5>\n<h5>If the data set makes up an odd number, then the median is the number right in the middle of the set.<\/h5>\n<h5>If the data set makes up an even number, then the median is the midpoint between the two middle numbers.<\/h5>\n<p>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"520\" height=\"245\" src=\"https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Table3.png\" alt=\"\" srcset=\"https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Table3.png 520w, https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Table3-300x141.png 300w, https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Table3-18x8.png 18w, https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Table3-106x50.png 106w\" sizes=\"auto, (max-width: 520px) 100vw, 520px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/p>\n<h5>Mode &#8212; this is simply the most commonly occurring number in the data set.<\/h5>\n<p>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"422\" height=\"303\" src=\"https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Table-5-1.png\" alt=\"\" srcset=\"https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Table-5-1.png 422w, https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Table-5-1-300x215.png 300w, https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Table-5-1-18x12.png 18w, https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Table-5-1-70x50.png 70w\" sizes=\"auto, (max-width: 422px) 100vw, 422px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/p>\n<h5>Standard deviation &#8212; this metric indicates how dispersed a range of numbers is. In other words, how close all the numbers are to the mean (the average).<\/h5>\n<h5>In cases where most of the numbers are quite close to the average, the standard deviation will be relatively low.<\/h5>\n<h5>\u00a0<\/h5>\n<h5>Conversely, in cases where the numbers are scattered all over the place, the standard deviation will be relatively high.<\/h5>\n<p>\u00a0<br \/>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"575\" height=\"299\" src=\"https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Table6.png\" alt=\"\" srcset=\"https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Table6.png 575w, https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Table6-300x156.png 300w, https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Table6-18x9.png 18w, https:\/\/certifeka-edu.com\/wp-content\/uploads\/2025\/08\/Table6-96x50.png 96w\" sizes=\"auto, (max-width: 575px) 100vw, 575px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/p>\n<h5>Skewness &#8211; As the name suggests, skewness indicates how symmetrical a range of numbers is.<\/h5>\n<h5>In other words, do they tend to cluster into a smooth bell curve shape in the middle of the graph, or do they skew to the left or right?<\/h5>","protected":false},"comment_status":"open","ping_status":"closed","template":"","class_list":["post-41328","lesson","type-lesson","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Lesson 3: Some common statistical tests used in descriptive statistics - Certifeka-edu<\/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:\/\/certifeka-edu.com\/ar\/programs\/sample-course\/lessons\/lesson-3-some-common-statistical-tests-used-in-descriptive-statistics-2\/\" \/>\n<meta property=\"og:locale\" content=\"ar_AR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Lesson 3: Some common statistical tests used in descriptive statistics - Certifeka-edu\" \/>\n<meta property=\"og:description\" content=\"Lesson 3: Data interpretation Some common statistical tests used in descriptive statistics: Mean &#8212; this is simply the mathematical average of a range of numbers. 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