{"id":6343,"date":"2011-07-12T23:53:29","date_gmt":"2011-07-12T23:53:29","guid":{"rendered":"https:\/\/www.diaryofanadi.co.uk\/?p=6343"},"modified":"2023-06-07T12:44:46","modified_gmt":"2023-06-07T11:44:46","slug":"if-a-little-knowledge-is-a-dangerous-thing","status":"publish","type":"post","link":"https:\/\/diaryofanadi.co.uk\/?p=6343","title":{"rendered":"If a Little Knowledge is a Dangerous Thing&#8230;"},"content":{"rendered":"\n<p>&#8230;then no knowledge whatsoever must be lethal!<\/p>\n\n\n\n<p>This is Plymouth (link long since dead) reports on a press release concerning test centre pass rates. Basically, 152 out of 340 test centres have pass rates of 50% or more. No one seems to have bothered to calculate that this is 45% of test centres &#8211; so you could say that about half of all test centres have pass rates of 50% or more, and half have pass rate of less.<\/p>\n\n\n\n<p>It&#8217;s a bit like saying that when you toss a coin there is a 50% chance of getting heads, and then getting all upset by it as if it&#8217;s a problem or something!<\/p>\n\n\n\n<p>This is Plymouth is worried that the Plymouth test centre has a failure rate of 60%, whereas other Devon centres have failure rates of 49%, 45%, and 42%. Why assume that the 60% one is wrong? What about the one at 42%?<\/p>\n\n\n\n<p>The highest failure rate was as Hermon Hill, Wanstead &#8211; 72% out of 4,826 first time tests.<\/p>\n\n\n\n<p>The lowest failure rates are in remote Scottish communities &#8211; with tiny populations:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Examiners in places such as Mallaig, Inveraray, Islay and the Isle of Skye test barely 200 candidates between them a year.<\/p>\n<\/blockquote>\n\n\n\n<p>Mallaig saw 14 first-time candidates last year and failed only 21% &#8211; or three &#8211;&nbsp;of them. Again, no one seems to have bothered to calculate that if they&#8217;d have failed a fourth then the failure rate would have leapt up to 29%. Fail a fifth and it&#8217;s a humongous 36%.<\/p>\n\n\n\n<p>In Wanstead, you&#8217;d have to fail another 50 to increase the failure rate by just 1%!<\/p>\n\n\n\n<p>It&#8217;s pretty obvious that driving around <a href=\"http:\/\/maps.google.co.uk\/maps?q=mallaig&amp;hl=en&amp;ll=56.995174,-5.823784&amp;spn=0.039366,0.059309&amp;sll=53.800651,-4.064941&amp;sspn=21.962056,30.366211&amp;z=14\" target=\"_blank\" rel=\"noopener noreferrer\" title=\"Google Maps - Mallaig\">Mallaig<\/a> is not the same as driving around <a href=\"http:\/\/maps.google.co.uk\/maps?q=wanstead&amp;hl=en&amp;sll=56.995174,-5.823784&amp;sspn=0.039366,0.059309&amp;z=16\" target=\"_blank\" rel=\"noopener noreferrer\" title=\"Google Maps - Wanstead\">Wanstead<\/a> &#8211; except to the media. And Wanstead hardly has the same sort of clientele as Mallaig. So why the big deal?<\/p>\n\n\n\n <script data-jetpack-boost=\"ignore\" async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-4532794719633406\"\r\n     crossorigin=\"anonymous\"><\/script>\n","protected":false},"excerpt":{"rendered":"<p>&#8230;then no knowledge whatsoever must be lethal! This is Plymouth (link long since dead) reports on a press release concerning test centre pass rates. Basically, 152 out of 340 test centres have pass rates of 50% or more. No one seems to have bothered to calculate that this is 45% of test centres &#8211; so [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[80,81,85],"tags":[],"class_list":["post-6343","post","type-post","status-publish","format-standard","hentry","category-adi-related","category-driving-test-related","category-dsa-related"],"aioseo_notices":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/diaryofanadi.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/6343","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/diaryofanadi.co.uk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/diaryofanadi.co.uk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/diaryofanadi.co.uk\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/diaryofanadi.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6343"}],"version-history":[{"count":0,"href":"https:\/\/diaryofanadi.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/6343\/revisions"}],"wp:attachment":[{"href":"https:\/\/diaryofanadi.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6343"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/diaryofanadi.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6343"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/diaryofanadi.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6343"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}