{"id":629,"date":"2013-06-26T18:59:11","date_gmt":"2013-06-26T17:59:11","guid":{"rendered":"https:\/\/blogs.bmj.com\/adc\/?p=629"},"modified":"2013-06-24T22:04:30","modified_gmt":"2013-06-24T21:04:30","slug":"statsminiblog-significance-tests-step-one","status":"publish","type":"post","link":"https:\/\/blogs.bmj.com\/adc\/2013\/06\/26\/statsminiblog-significance-tests-step-one\/","title":{"rendered":"StatsMiniBlog: Significance tests. Step one."},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignleft\" alt=\"\" src=\"http:\/\/zonalandeducation.com\/mstm\/physics\/mechanics\/kinematics\/EquationsForAcceleratedMotion\/Introductions\/Displacement\/Image78.gif\" width=\"180\" height=\"76\" \/>Moving through from \u00a0<a title=\"StatsMiniBlog: Standard Error\" href=\"https:\/\/blogs.bmj.com\/adc\/2013\/06\/16\/statsminiblog-standard-error\/\">estimating how the mean of a sample might reflect the mean of the population at large<\/a>, we want to see if there are differences between two (or more) groups. This is usually done by &#8216;doing a statistical test&#8217;. What we won&#8217;t be dealing with here is the maths that derives these, the processes of creating the test score and checking this through to an answer, but the core concept. What is it we&#8217;re doing when we\u00a0&#8216;do a statistical test&#8217;<\/p>\n<p><!--more--><\/p>\n<p>We&#8217;re asking &#8216;what&#8217;s the likelihood that the results I&#8217;ve got from these two groups are different only because of the play of chance?&#8217;<\/p>\n<p>Then the <a title=\"What about benefits?\" href=\"https:\/\/blogs.bmj.com\/adc\/2010\/06\/01\/what-about-benefits\/\">p-value gives us an answer<\/a>.<\/p>\n<p>p=0.01; the likelihood of the results from these two groups being found purely because of chance is 1 in 100.<\/p>\n<p>Exactly what we are looking at when we examine &#8220;the results I&#8217;ve got from these two groups&#8221;, and so which statistical test to use, is where we&#8217;re going with the next post.<\/p>\n<p>&#8211; Archi<!--TrendMD v2.4.8--><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Moving through from \u00a0estimating how the mean of a sample might reflect the mean of the population at large, we want to see if there are differences between two (or more) groups. This is usually done by &#8216;doing a statistical test&#8217;. What we won&#8217;t be dealing with here is the maths that derives these, the [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/blogs.bmj.com\/adc\/2013\/06\/26\/statsminiblog-significance-tests-step-one\/\">Read More&#8230;<\/a><\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[79,2676],"tags":[],"class_list":["post-629","post","type-post","status-publish","format-standard","hentry","category-archimedes","category-stats"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>StatsMiniBlog: Significance tests. Step one. - ADC Online Blog<\/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:\/\/blogs.bmj.com\/adc\/2013\/06\/26\/statsminiblog-significance-tests-step-one\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"StatsMiniBlog: Significance tests. Step one. - ADC Online Blog\" \/>\n<meta property=\"og:description\" content=\"Moving through from \u00a0estimating how the mean of a sample might reflect the mean of the population at large, we want to see if there are differences between two (or more) groups. This is usually done by &#8216;doing a statistical test&#8217;. What we won&#8217;t be dealing with here is the maths that derives these, the [...]Read More...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.bmj.com\/adc\/2013\/06\/26\/statsminiblog-significance-tests-step-one\/\" \/>\n<meta property=\"og:site_name\" content=\"ADC Online Blog\" \/>\n<meta property=\"article:published_time\" content=\"2013-06-26T17:59:11+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/zonalandeducation.com\/mstm\/physics\/mechanics\/kinematics\/EquationsForAcceleratedMotion\/Introductions\/Displacement\/Image78.gif\" \/>\n<meta name=\"author\" content=\"Bob Phillips\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Bob Phillips\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/2013\\\/06\\\/26\\\/statsminiblog-significance-tests-step-one\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/2013\\\/06\\\/26\\\/statsminiblog-significance-tests-step-one\\\/\"},\"author\":{\"name\":\"Bob Phillips\",\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/#\\\/schema\\\/person\\\/9e94029681ecf36e73bbd1eb2be2ef94\"},\"headline\":\"StatsMiniBlog: Significance tests. 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