document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=795605>Question 795605</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Assume that adults have IQ scores that are normally distributed with a mean of 105 and standard deviation 15. Find P9 which is the IQ score separating the bottom 9% from the top 91%.<BR>\n" );
document.write( "Any help would be greatly appriciated<BR>\n" );
document.write( "Thanks, Cass </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #481179 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=481179\">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 105 and standard deviation 15. Find P9 which is the IQ score separating the bottom 9% from the top 91%.<BR>\n" );
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document.write( "Find the z-value with a left tail of 9%.<BR>\n" );
document.write( "invNorm(0.09) = -1.3408<BR>\n" );
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document.write( "Find the corresponding \"x\" value::<BR>\n" );
document.write( "x = z*s +u<BR>\n" );
document.write( "x = -1.3408*15+105 = 84.89<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "============= </SPAN>\n" );
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