document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1134483>Question 1134483</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The faculty and staff at Dana-Farber Cancer Institute in Boston are required to undergo a tuberculosis test each year. Use the following table to answer the questions below.\r<BR>\n" );
document.write( "\n" );
document.write( "Test Results 	Tuberculosis 	No Tuberculosis 	Total<BR>\n" );
document.write( "Positive 	4995 	99,950 	104,945<BR>\n" );
document.write( "Negative 	5 	9,895,050 	9,895,055<BR>\n" );
document.write( "Total 	5,000 	9,995,000 	10,000,000\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "a.  If a Dana-Farber faculty or staff worker goes in to have a TB test, what is the chance of him/her getting a positive test result? (7.5 pts)<BR>\n" );
document.write( "b.  What is the positive predictive value of the test? (7.5 pts)  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #751902 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=751902\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Test Results Tuberculosis No Tuberculosis Total<BR>\n" );
document.write( "Positive         4995               99,950       104,945<BR>\n" );
document.write( "Negative            5         9,895,050         9,895,055<BR>\n" );
document.write( "Total           5,000          9,995,000       10,000,000 \r<BR>\n" );
document.write( "\n" );
document.write( "Positive result is 104945/10000000=0.0105\r<BR>\n" );
document.write( "\n" );
document.write( "PPV is probability when test is positive disease is present.  That is 4995/104945 or 0.0476 or 4.76%\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );