{"id":7259,"date":"2014-12-23T07:59:27","date_gmt":"2014-12-23T07:59:27","guid":{"rendered":"http:\/\/www.oracletutoring.ca\/blog\/?p=7259"},"modified":"2014-12-23T07:59:27","modified_gmt":"2014-12-23T07:59:27","slug":"statistics-an-easy-estimate-of-the-standard-deviation","status":"publish","type":"post","link":"https:\/\/www.oracletutoring.ca\/blog\/statistics-an-easy-estimate-of-the-standard-deviation\/","title":{"rendered":"Statistics: an easy estimate of the standard deviation"},"content":{"rendered":"

Tutoring statistics, I’m happy to add this method to my repertoire. \u00a0The tutor brings forth a shortcut for finding the standard deviation.<\/h1>\n

According to my source listed below, the standard deviation (\u03c3) can be estimated as follows:<\/p>\n

\u03c3=range\/6<\/center>
\nThe range is defined as the\u00a0greatest-least<\/em> values of the data set.<\/p>\n

The reasoning behind the estimate is that, with a normal distribution, 99.7% of the data lies between\u00a0\u00b5-3\u03c3 and \u00b5+3\u03c3,\u00a0\u00b5 being the mean, or center point, of the data. \u00a0(\u00b5+3\u03c3) – (\u00b5-3\u03c3)=\u00b5+3\u03c3-\u00b5+3\u03c3=6\u03c3, but also equals the range. Since the range equals 6\u03c3,\u00a0\u03c3=range\/6.<\/p>\n

In my next article, I’ll compare the standard deviation computed from the proper formula to what you get from the estimate above. \u00a0I’m as curious as you are:)<\/p>\n

Source:<\/p>\n

Zimmer, Cooke, et.al. \u00a0Mathematics of Data Management<\/em>. \u00a0Toronto:   Nelson, 2003.<\/p>\n

Jack of Oracle Tutoring by Jack and Diane,<\/a> Campbell River, BC.<\/p>\n","protected":false},"excerpt":{"rendered":"

Tutoring statistics, I’m happy to add this method to my repertoire. \u00a0The tutor brings forth a shortcut for finding the standard deviation. According to my source listed below, the standard deviation (\u03c3) can be estimated as follows: \u03c3=range\/6 The range …<\/p>\n

Statistics: an easy estimate of the standard deviation<\/span> Read More »<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19],"tags":[375,374,20],"class_list":["post-7259","post","type-post","status-publish","format-standard","hentry","category-statistics","tag-easy-estimate-of-standard-deviation","tag-quick-estimate-of-standard-deviation","tag-standard-deviation"],"_links":{"self":[{"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/posts\/7259","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/comments?post=7259"}],"version-history":[{"count":14,"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/posts\/7259\/revisions"}],"predecessor-version":[{"id":7273,"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/posts\/7259\/revisions\/7273"}],"wp:attachment":[{"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/media?parent=7259"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/categories?post=7259"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/tags?post=7259"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}