document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=522259>Question 522259</A>: <I><SPAN STYLE=\"word-break: break-all;\"> assume that adults have IQ scores that are normally distributed with a mean of 101 and standard deviation of 15. Find quartile 3 which is the IQ score seperating the top 25% from the others </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #346760 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=346760\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> assume that adults have IQ scores that are normally distributed with a mean of 101 and standard deviation of 15. Find quartile 3 which is the IQ score seperating the top 25% from the others<BR>\n" );
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document.write( "Find the z-value that has a left-tail of  0.75.<BR>\n" );
document.write( "invNorm(0.75) = 0.6745<BR>\n" );
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document.write( "Find the corresponding score value using x = zs+u<BR>\n" );
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document.write( "x = .6745*15+101 = 111.12<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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