document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=762913>Question 762913</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Assume the Random Variable X is normally distributed with mean = 50 and the standard deviation = 7. Compute the probability. P(X>40).  I am really stumped on these and tried to get the same answer on problems you have on this site and I cant seem to do it. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #464340 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=464340\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> for this problem, we first calculate P(X<40) and then<BR>\n" );
document.write( "P(X>40) = 1 - P(X<40)<BR>\n" );
document.write( "to calculate P(X<40), we calculate the associated z-value<BR>\n" );
document.write( "z-value = (40 - 50) / 7 =  -1.43<BR>\n" );
document.write( "referring to the negative z table values we find that<BR>\n" );
document.write( "P(X<40) = .08 and<BR>\n" );
document.write( "P(X>40) = 1 - .08 = .92 or 92%\r<BR>\n" );
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