document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=934850>Question 934850</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Student population of 4000 take a test. The mean is 610 and standard deviation is 60. How many students score 570 or higher? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #567931 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><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=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=567931\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Pr(X>570) = 1 - Pr(X<570)<BR>\n" );
document.write( "calculate z-score for Pr(X<570)<BR>\n" );
document.write( "z-score = (570 - 610) / 60 = &#8722;0.666666667 approx -0.67<BR>\n" );
document.write( "Pr(X>570) = 1 - Pr(X<570) = 1 - 0.2514 = 0.7486<BR>\n" );
document.write( "now 4000 * 0.7486 = 2994.4 = 2994 students<BR>\n" );
document.write( " </SPAN>\n" );
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