document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=266768>Question 266768</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 7.64 Jim’s systolic blood pressure is a random variable with a mean of 145 mmHg and a standard<BR>\n" );
document.write( "deviation of 20 mmHg. For Jim’s age group, 140 is the cutoff for high blood pressure. (a) If Jim’s<BR>\n" );
document.write( "systolic blood pressure is taken at a randomly chosen moment, what is the probability that it will<BR>\n" );
document.write( "be 135 or less? (b) 175 or more? (c) Between 125 and 165? (d) Discuss the implications of<BR>\n" );
document.write( "variability for physicians who are trying to identify patients with high blood pressure.<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 #195990 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=195990\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 7.64 Jim’s systolic blood pressure is a random variable with a mean of 145 mmHg and a standard deviation of 20 mmHg. <BR>\n" );
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document.write( "For Jim’s age group, 140 is the cutoff for high blood pressure. <BR>\n" );
document.write( "(a) If Jim’s systolic blood pressure is taken at a randomly chosen moment, what is the probability that it will be 135 or less?<BR>\n" );
document.write( "P(0<= 135)) = normalcdf(0,135,145,20) = 0.3085<BR>\n" );
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document.write( "(b) 175 or more?<BR>\n" );
document.write( "P(x>= 175) = 1 - normalcdf(0,175,145,20) = 1- 0.9332 = 0.0668<BR>\n" );
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document.write( "(c) Between 125 and 165?<BR>\n" );
document.write( "I'll leave this to you.<BR>\n" );
document.write( "I get 0.6827<BR>\n" );
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document.write( "(d) Discuss the implications of variability for physicians who are trying to identify patients with high blood pressure.<BR>\n" );
document.write( "Discussion topic for you.<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
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