document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1161884>Question 1161884</A>: <I><SPAN STYLE=\"word-break: break-all;\"> On the assumption that IQ'S are normally distributed in the population with a mean of 100 and a standard deviation of 15. Find the proportion of people with IQ'S between 85-120 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #785582 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=785582\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> z=(x-mean)/sd<BR>\n" );
document.write( "so want z between -1 and +1.33<BR>\n" );
document.write( "and that is 0.7501 probability\r<BR>\n" );
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document.write( "Alternatively, use 2nd VARS 2 normalcdf(85,120,100,15) ENTER in that order, and it does the whole calculation at once and does it exactly, whereas the above 1.333 is not quite (4/3). </SPAN>\n" );
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