document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=114746>Question 114746</A>: <I><SPAN STYLE=\"word-break: break-all;\"> IQ scores have a normal distribution with a mean of 100 and a standard deviation of 15.    Out of a student body of 1800 students, how many would you expect to have an IQ above 120?\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #83516 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=83516\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> IQ scores have a normal distribution with a mean of 100 and a standard deviation of 15.    Out of a student body of 1800 students, how many would you expect to have an IQ above 120?<BR>\n" );
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document.write( "Find the z-score for 120<BR>\n" );
document.write( "z(120)= (120-100)/15<BR>\n" );
document.write( "z(120) = 1.333333....<BR>\n" );
document.write( "Prob(z>1.3333...) = 0.09121182...<BR>\n" );
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document.write( "Answer: 0.09121192..*1800 = 164.18..<BR>\n" );
document.write( "Rounding down get 164 students.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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