document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1061835>Question 1061835</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Probability that a person who tests positive actually has the disease.\r<BR>\n" );
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document.write( "A certain disease has an incidence rate of 0.4%. If the false negative rate is 4% and the false positive rate is 4%,  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #711733 by </B><A HREF=/tutors/aboutme.mpl?userid=jorel1380><B>jorel1380(3719)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jorel1380><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=jorel1380><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=711733\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Consider a sample population of 100,000. Then .004 x 100,000, or 400 actually have the disease. Out of these 400, 96%, or 384 will test positive. Out of the 99,600 who don't have the disease, 4%, or 3,984 will test positive. Therefore, the probability that someone who tested positive will actually have the disease is 384/384+3984, or 0.0879121<BR>\n" );
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