{"id":17391,"date":"2013-03-20T02:00:51","date_gmt":"2013-03-20T09:00:51","guid":{"rendered":"https:\/\/gmatclub.com\/blog\/?p=17391"},"modified":"2013-03-15T17:46:37","modified_gmt":"2013-03-16T00:46:37","slug":"gmat-question-of-the-day-mar-20-statistics-and-critical-reasoning-2","status":"publish","type":"post","link":"https:\/\/gmatclub.com\/blog\/gmat-question-of-the-day-mar-20-statistics-and-critical-reasoning-2\/","title":{"rendered":"GMAT Question of the Day (Mar 20): 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<div>\n<a href=\"https:\/\/gmatclub.com\/forum\/m24-q-76516.html\">Question Discussion &amp; Explanation<\/a><br \/>\n<strong>Correct Answer<\/strong> <span style=\"background-color:#fff;color:#fff\">- E -<\/span> (click and drag your mouse to see the answer)\n<\/div>\n<p><\/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\">Knewton Gmat: Fully customized prep w\/ highest point increase guarantee in the industry. <a href=\"https:\/\/gmatclub.com\/blog\/courses\/knewton-gmat-discount-coupon-code\/?fl=twitter\" style=\"color: rgb(0, 0, 255);\"><u>Save $350.<\/u><\/a><\/li>\n<li style=\"padding: 0pt 0pt 10px 20px; color: rgb(255, 255, 255); list-style-type: disc\">Amerasia: A customized, one-on-one, boutique consulting experience.  <a href=\"https:\/\/gmatclub.com\/blog\/courses\/amerasia-consulting-group-save-via-gmat-club\/?fl=twitter\" style=\"color: rgb(0, 0, 255);\"><u>Save 10% via GMAT Club.<\/u><\/a><\/li>\n<li style=\"padding: 0pt 0pt 0px 20px; color: rgb(255, 255, 255); list-style-type: disc\">GMAT Club offers a special promo code to get $500 off Stratus Prep package of 3+ schools.  <a href=\"https:\/\/gmatclub.com\/blog\/courses\/stratus-prep-discount\/?fl=twitter\" style=\"color: rgb(0, 0, 255);\"><u>Learn more!<\/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<div>\n<a href=\"https:\/\/gmatclub.com\/forum\/the-average-age-of-chief-executive-officers-in-a-large-77916.html\">Question Discussion &amp; Explanation<\/a><br \/>\n<strong>Correct Answer<\/strong> <span style=\"background-color:#fff;color:#fff\">- C -<\/span> (click and drag your mouse to see the answer)\n<\/div>\n<p><\/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=blog&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<p><a href=\"https:\/\/gmatclub.com\/blog\/category\/blog\/gmat-tests\/\"><strong>Browse all GMAT Questions of the Day<\/strong><\/a><\/p>\n<p><strong>Subscribe to GMAT Question of the Day:<\/strong> <a href=\"https:\/\/feedburner.google.com\/fb\/a\/mailverify?uri=GMAT-Question-of-the-day&amp;loc=en_US\">E-mail<\/a> | <a href=\"https:\/\/feeds.feedburner.com\/GMAT-Question-of-the-day\">RSS<\/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":138,"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-17391","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\/17391","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\/138"}],"replies":[{"embeddable":true,"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/comments?post=17391"}],"version-history":[{"count":6,"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/posts\/17391\/revisions"}],"predecessor-version":[{"id":17393,"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/posts\/17391\/revisions\/17393"}],"wp:attachment":[{"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/media?parent=17391"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/categories?post=17391"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/tags?post=17391"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}