{"id":42535,"date":"2014-03-15T07:13:03","date_gmt":"2014-03-15T01:43:03","guid":{"rendered":"http:\/\/vskills.in\/certification\/tutorial\/?p=42535"},"modified":"2024-04-12T14:19:43","modified_gmt":"2024-04-12T08:49:43","slug":"descriptive-statistics-2","status":"publish","type":"page","link":"https:\/\/www.vskills.in\/certification\/tutorial\/descriptive-statistics-2\/","title":{"rendered":"Descriptive Statistics"},"content":{"rendered":"\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><a ref=\"magnificPopup\" href=\"https:\/\/www.vskills.in\/certification\/tutorial\/wp-content\/uploads\/2020\/12\/Certified-IndAS-Professional-5-1.png\"><img loading=\"lazy\" decoding=\"async\" width=\"750\" height=\"400\" src=\"https:\/\/www.vskills.in\/certification\/tutorial\/wp-content\/uploads\/2020\/12\/Certified-IndAS-Professional-5-1.png\" alt=\"Descriptive Statistics\" class=\"wp-image-93618\" srcset=\"https:\/\/www.vskills.in\/certification\/tutorial\/wp-content\/uploads\/2020\/12\/Certified-IndAS-Professional-5-1.png 750w, https:\/\/www.vskills.in\/certification\/tutorial\/wp-content\/uploads\/2020\/12\/Certified-IndAS-Professional-5-1-300x160.png 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/a><\/figure><\/div>\n\n\n<p>\u00a0<\/p>\n<p>Descriptive Statistics- In general terms, descriptive statistics do just what the name implies\u2026 they describe things! \u00a0There are two variables descriptive statistics entails:<\/p>\n<p>1) central tendency and<\/p>\n<p>2) spread or dispersion.<\/p>\n<h5><strong>The Mean<\/strong><\/h5>\n<p>The most common measure of central tendency is the mean or average.\u00a0 To calculate the mean, the data points are added and then divided by the number of data points.<\/p>\n<p>An important point is that the mean should only be used when the data is from a normal distribution.\u00a0 If, for example, the data is from an exponential distribution (e.g. most \u201ctime\u201d related metrics) the mean should not be taken to describe its central tendency.\u00a0 Instead, the median should be used.<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><a ref=\"magnificPopup\" href=\"https:\/\/www.vskills.in\/certification\/tutorial\/wp-content\/uploads\/2020\/12\/mean.png\"><img loading=\"lazy\" decoding=\"async\" width=\"629\" height=\"341\" src=\"https:\/\/www.vskills.in\/certification\/tutorial\/wp-content\/uploads\/2020\/12\/mean.png\" alt=\"\" class=\"wp-image-93622\" srcset=\"https:\/\/www.vskills.in\/certification\/tutorial\/wp-content\/uploads\/2020\/12\/mean.png 629w, https:\/\/www.vskills.in\/certification\/tutorial\/wp-content\/uploads\/2020\/12\/mean-300x163.png 300w\" sizes=\"auto, (max-width: 629px) 100vw, 629px\" \/><\/a><\/figure><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>The Median<\/strong><\/h5>\n\n\n\n<p>Let\u2019s say we have the following data set: 1, 9, 11, 22, 9, 1, 6, 1, 2&nbsp;and desire to know the median. Here is how we do it.<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Sort the data in descending order: 22, 11, 9, 9, 6, 2, 1, 1, 1<\/li><li>Find the middle of the data set which will be the median: The integer 6 is in the middle and is our median.<\/li><\/ol>\n\n\n\n<p>If there are an even number of data points, the two numbers that comprise the center are averaged since there will not be one single&nbsp;number dead in the middle.<\/p>\n\n\n\n<p>The median is generally used when dealing with skewed distributions.&nbsp; The most common example is home prices.<\/p>\n\n\n\n<p>Since there are always a few \u201cexpensive\u201d homes in the neighborhood the distribution is often skewed.&nbsp; This makes using the median more appropriate since these \u201coutliers\u201d are not able to skew the result.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>The Mode<\/strong><\/h5>\n\n\n\n<p>The least used measure of central tendency is the mode.&nbsp; The mode is simply the most&nbsp;frequent value in a data set.&nbsp; Using the example above {22, 11, 9, 9, 6, 2, 1, 1, 1} the mode would be 1 since it occurs more times (3) than any other number.<\/p>\n\n\n\n<p><strong>MS Excel Tips<\/strong><\/p>\n\n\n\n<p>Excel can be used to figure these out for us.&nbsp; Here is how:<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>For the mean use the following: =average(data set)<\/li><li>For the median use the following: =median(data set)<\/li><li>For the mode use the following: =mode(data set)<\/li><\/ol>\n\n\n\n<p>Test Your Six Sigma Black Belt Skills By Taking Our Practice Tests on This <a href=\"http:\/\/www.vskills.in\/practice\/quiz\/Six-Sigma-Black-Belt\">Link<\/a><\/p>\n\n\n\n<p>Apply for Six Sigma Black Belt Certification Now!!<\/p>\n\n\n\n<p><a href=\"http:\/\/www.vskills.in\/certification\/Certified-Six-Sigma-Black-Belt-Professional\">http:\/\/www.vskills.in\/certification\/Certified-Six-Sigma-Black-Belt-Professional<\/a><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><a href=\"https:\/\/www.vskills.in\/practice\/six-sigma-black-belt\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"961\" height=\"150\" src=\"https:\/\/www.vskills.in\/certification\/tutorial\/wp-content\/uploads\/2020\/12\/1Z0-1050-20-Oracle-Payroll-Cloud-2020-Implementation-Essentials-1.png\" alt=\"\" class=\"wp-image-93217\" srcset=\"https:\/\/www.vskills.in\/certification\/tutorial\/wp-content\/uploads\/2020\/12\/1Z0-1050-20-Oracle-Payroll-Cloud-2020-Implementation-Essentials-1.png 961w, https:\/\/www.vskills.in\/certification\/tutorial\/wp-content\/uploads\/2020\/12\/1Z0-1050-20-Oracle-Payroll-Cloud-2020-Implementation-Essentials-1-300x47.png 300w\" sizes=\"auto, (max-width: 961px) 100vw, 961px\" \/><\/a><\/figure><\/div>\n\n\n\n<p><a href=\"https:\/\/www.vskills.in\/certification\/tutorial\/six-sigma-black-belt-certification\/\" target=\"_blank\" rel=\"noreferrer noopener\">Go back to Tutorial<\/a>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <a href=\"https:\/\/www.vskills.in\/certification\/Certified-Six-Sigma-Black-Belt-Professional\" target=\"_blank\" rel=\"noreferrer noopener\">Go to Home Page<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00a0 Descriptive Statistics- In general terms, descriptive statistics do just what the name implies\u2026 they describe things! \u00a0There are two variables descriptive statistics entails: 1) central tendency and 2) spread or dispersion. The Mean The most common measure of central tendency is the mean or average.\u00a0 To calculate the mean, the data points are added&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"categories":[3897,6280],"tags":[9750,9747,9749,9751,9748,6923,6848,6871],"class_list":["post-42535","page","type-page","status-publish","hentry","category-quality","category-six-sigma-black-belt-quality","tag-certified-six-sigma-black-belt-professional-course-outline","tag-certified-six-sigma-black-belt-professional-exam-details","tag-certified-six-sigma-black-belt-professional-free-practice-test","tag-certified-six-sigma-black-belt-professional-online-tutorial","tag-certified-six-sigma-black-belt-professional-preparatory-guide","tag-descriptive-statistics","tag-quality","tag-tutorials"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Six Sigma Black Belt Tutorial | Descriptive Statistics<\/title>\n<meta name=\"description\" content=\"In general terms descriptive statistics do just what the name implies\u2026 they describe things! 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