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http://mathforum.org/kb/thread.jspa?messageID=7387707&tstart=0#7387707
There has been such an emphasis on this listserv about the mantra "z is for proportions, t is for means" that we may have gone a]]>Feb 18, 2011 9:32:46 AMFeb 18, 2011 9:32:46 AMdstarnes@lawrenceville.org0[ap-stat] when sigma is known
http://mathforum.org/kb/thread.jspa?messageID=7387708&tstart=0#7387708
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