document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=905928>Question 905928</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The verbal part of the Graduate Record Exam (GRE) has a mean of 500 and a standard deviation of 100. Use the normal distribution to answer the following questions:\r<BR>\n" );
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document.write( "a. If you wanted to select only students at or above the 90th percentile, what verbal GRE score would you use as a cutoff score?<BR>\n" );
document.write( "b. What verbal GRE score corresponds to a percentile rank of 15%? <BR>\n" );
document.write( "c. What’s the percentile rank of a GRE score of 628? <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 #549513 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=549513\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a. z = invNorm(.90) = (X-500)/100<BR>\n" );
document.write( "100invNorm(.90) + 500 = X, score would you use as a cutoff score<BR>\n" );
document.write( "b. <BR>\n" );
document.write( "100invNorm(.15) + 500 = X, verbal GRE score corresponds to a percentile rank of 15%<BR>\n" );
document.write( "z = (628-500)/100 = 128/100 = 1.28<BR>\n" );
document.write( "normalcdf(-100, 1.28) </SPAN>\n" );
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