document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=965773>Question 965773</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Assume that blood pressure readings are normally distributed with a mean of 118 and a standard deviation of 9. If one person is randomly selected, find the probability that his/her blood pressure will be greater than 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 #590286 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=590286\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Probability(Pr) ( X > 120 ) = 1 - Pr ( X < 120 )<BR>\n" );
document.write( "compute z-score for 120.<BR>\n" );
document.write( "z-score = (120 - 118) / 9 = 0.222222222 approx .22<BR>\n" );
document.write( "consult z-tables for probability associated with z-score .22, which is<BR>\n" );
document.write( "0.5871, therefore<BR>\n" );
document.write( "Pr ( X > 120 ) = 1 - 0.5871 = 0.4129 approx 0.41<BR>\n" );
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