{"id":6563,"date":"2011-03-15T02:00:27","date_gmt":"2011-03-15T10:00:27","guid":{"rendered":"https:\/\/gmatclub.com\/blog\/?p=6563"},"modified":"2011-03-15T02:07:01","modified_gmt":"2011-03-15T10:07:01","slug":"gmat-question-of-the-day-mar-15-statistics-and-critical-reasoning","status":"publish","type":"post","link":"https:\/\/gmatclub.com\/blog\/gmat-question-of-the-day-mar-15-statistics-and-critical-reasoning\/","title":{"rendered":"GMAT Question of the Day (Mar 15): Statistics and Critical Reasoning"},"content":{"rendered":"<p><strong>Math (DS)<\/strong><\/p>\n<p>If sets <img src='https:\/\/s0.wp.com\/latex.php?latex=S&#038;bg=ffffff&#038;fg=000000&#038;s=0' alt='S' title='S' class='latex' \/> and <img src='https:\/\/s0.wp.com\/latex.php?latex=T&#038;bg=ffffff&#038;fg=000000&#038;s=0' alt='T' title='T' class='latex' \/> are united into a single set, will the mean of this set be smaller than the sum of means of sets <img src='https:\/\/s0.wp.com\/latex.php?latex=S&#038;bg=ffffff&#038;fg=000000&#038;s=0' alt='S' title='S' class='latex' \/> and <img src='https:\/\/s0.wp.com\/latex.php?latex=T&#038;bg=ffffff&#038;fg=000000&#038;s=0' alt='T' title='T' class='latex' \/> ?<\/p>\n<p>1. <img src='https:\/\/s0.wp.com\/latex.php?latex=S&#038;bg=ffffff&#038;fg=000000&#038;s=0' alt='S' title='S' class='latex' \/> and <img src='https:\/\/s0.wp.com\/latex.php?latex=T&#038;bg=ffffff&#038;fg=000000&#038;s=0' alt='T' title='T' class='latex' \/> are one-element sets<br \/>\n2. Neither set <img src='https:\/\/s0.wp.com\/latex.php?latex=S&#038;bg=ffffff&#038;fg=000000&#038;s=0' alt='S' title='S' class='latex' \/> nor set <img src='https:\/\/s0.wp.com\/latex.php?latex=T&#038;bg=ffffff&#038;fg=000000&#038;s=0' alt='T' title='T' class='latex' \/> contains negative numbers<\/p>\n<p><a href=\"https:\/\/gmatclub.com\/forum\/m24-q-76516.html\">OA and Explanation<\/a><\/p>\n<div style=\"background-color: rgb(141, 179, 226); border-top: 4px solid rgb(0, 0, 0); border-bottom: 4px solid rgb(0, 0, 0); padding: 5px; margin-left: 20px; font-size: 15px; font-family: Gergia,serif; font-weight: bold\">\n<div style=\"font-size: 19px; color: rgb(255, 255, 255); margin-bottom: 10px; padding-left: 10px\">GMAT Daily Deals<\/div>\n<ul>\n<li style=\"padding: 0pt 0pt 10px 20px; color: rgb(255, 255, 255); list-style-type: disc\">March Madness begins and so do the special savings from Knewton's Online Course! <a href=\"https:\/\/budurl.com\/KnewtonMarch\" style=\"color: rgb(0, 0, 255);\"><u>Sign up now to save $290<\/u><\/a>.<\/li>\n<li style=\"padding: 0pt 0pt 0px 20px; color: rgb(255, 255, 255); list-style-type: disc\">ACCESS MBA Tour, Holiday Inn Z\u00fcrich Messe, Do., 24.03., 16:00 \u2013 21:00 h. Jetzt registrieren unter <a href=\"https:\/\/bit.ly\/ZurichMBA\" style=\"color: rgb(0, 0, 255);\"><u>https:\/\/bit.ly\/ZurichMBA<\/u><\/a>.<\/li>\n<\/ul>\n<\/div>\n<p><\/p>\n<p><strong>Verbal (CR)<\/strong><\/p>\n<p>The average age of chief executive officers in a large sample of companies is 57.The average age of CEO's in those same companies 20 years ago was approximately eight years younger. On the basis of those data,it can be concluded that CEO's in general tend to be older now.<\/p>\n<p>Which of the following casts the most doubt on the conclusion drawn above?<\/p>\n<p>(A) The dates when the CEO's assumed their current positions have not been specified.<br \/>\n(B) No information is given concerning the avg no of years that CEO's remain in office.<br \/>\n(C) The information is based only on companies that have been operating for at least 20 years.<br \/>\n(D) Only approximate information is given concerning the avg age of the CEO's 20 years ago.<br \/>\n(E) Information concerning the exact number of companies in the sample has not been given.<\/p>\n<p><a href=\"https:\/\/gmatclub.com\/forum\/cr-77916.html\">OA and Explanation<\/a><\/p>\n<p><strong>Like these questions?<\/strong> Get the GMAT Club question collection: <a href=\"https:\/\/gmatclub.com\/tests\/\">online at GMAT Club<\/a> OR <a href=\"https:\/\/www.amazon.com\/gp\/redirect.html?ie=UTF8&location=http%3A%2F%2Fwww.amazon.com%2Fgp%2Fentity%2FGMAT-Club%2FB0048PPF3U%3Fie%3DUTF8%26ref_%3Dntt_athr_dp_pel_1&tag=gmatclub-20&linkCode=ur2&camp=1789&creative=390957\">on your Kindle<\/a> OR <a href=\"https:\/\/click.linksynergy.com\/fs-bin\/stat?id=PJTlq5NYqfE&offerid=146261&type=3&subid=0&tmpid=1826&RD_PARM1=http%253A%252F%252Fitunes.apple.com%252Fus%252Fapp%252Fgmat-toolkit%252Fid328345537%253Fmt%253D8%2526uo%253D6%2526partnerId%253D30\">on your iPhone\/iPad<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Math (DS) If sets and are united into a single set, will the mean of this set be smaller than the sum of means of sets and ? 1. and&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[152,9,721,718],"tags":[],"class_list":["post-6563","post","type-post","status-publish","format-standard","hentry","category-gmat-tests","category-gmat","category-critical-reasoning-gmat","category-data-sufficiency-gmat","entry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/posts\/6563","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/comments?post=6563"}],"version-history":[{"count":1,"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/posts\/6563\/revisions"}],"predecessor-version":[{"id":6564,"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/posts\/6563\/revisions\/6564"}],"wp:attachment":[{"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/media?parent=6563"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/categories?post=6563"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/tags?post=6563"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}