document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1132699>Question 1132699</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The NIH is creating a test for the Zika virus. The incidence of a Zika is low, 2 percent in the general population.  There is a trial version, but it sometimes misses the disease.  The probability of a false negative is 13 percent.  Similarly, someone who does not have Zika, will sometimes get a positive reading.  The probability of this is 10 percent.   \r<BR>\n" );
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document.write( "Calculate the probability that a positive test result means someone has Zika. <BR>\n" );
document.write( "(Answer in percent to 2 decimal places).<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 #749825 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=749825\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Use a group of 10000, where 200 have Zika<BR>\n" );
document.write( "------------------Test +-------------Test- ----------total<BR>\n" );
document.write( "Person has-------174------------------26--------------200 false negatives are 26<BR>\n" );
document.write( "Person doesn't----980-----------------8820-------------9800<BR>\n" );
document.write( "Total------------1154-----------------8846------------10000\r<BR>\n" );
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document.write( "There are 1154 positive tests and 174 have the disease, so if positive, there is a 15.08% one has the disease. </SPAN>\n" );
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