document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1161585>Question 1161585</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The average IQ is 100. The distribution is normal with a standard deviation of 15.\r<BR>\n" );
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document.write( "	A. What is the probability that a randomly selected person has an IQ greater than 117?\r<BR>\n" );
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document.write( "	B. What percentage of the population has an IQ between 88 and 108\r<BR>\n" );
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document.write( "	C. What IQ represents the 98th percentile? (That’s the score that 98% of the population would fall below.)<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 #785202 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=785202\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> z=(x-mean)/sd = (117-100)/15 =17/15 or 1.133<BR>\n" );
document.write( "probability z>1.133 is 0.1285\r<BR>\n" );
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document.write( "between 88 and 108 one can use the calculator and do 2nd VARS 2 Normcdf (88,108,100,15) to get a probability that is 0.4912 or 49%.\r<BR>\n" );
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document.write( "for the 98th percentile, which has a z-value of >2, the IQ should be greater than 130<BR>\n" );
document.write( "use invnorm (2 VARS 3) (.98, 100, 15) for 130.81 </SPAN>\n" );
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