document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=386802>Question 386802</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In the tests of a new pharmaceutical product, data were<BR>\n" );
document.write( "collected for use in the approval process required by the<BR>\n" );
document.write( "U.S. Food and Drug Administration (FDA). Some participants<BR>\n" );
document.write( "were given a placebo, an inert substance that<BR>\n" );
document.write( "looks like the drug; others were given the drug. The<BR>\n" );
document.write( "data are shown in the following table:<BR>\n" );
document.write( "Drug: No Help 22 Help 47<BR>\n" );
document.write( "Placebo: No Help 31 Help 20<BR>\n" );
document.write( "What is the probability that:<BR>\n" );
document.write( "a. the participants perceived that their “medication”<BR>\n" );
document.write( "helped if they received the drug?<BR>\n" );
document.write( "b. the participants perceived that their “medication”<BR>\n" );
document.write( "helped if they received the placebo?<BR>\n" );
document.write( "c. the participants perceived that their “medication”<BR>\n" );
document.write( "helped?<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #273408 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=273408\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Some participants<BR>\n" );
document.write( "were given a placebo, an inert substance that<BR>\n" );
document.write( "looks like the drug; others were given the drug. The<BR>\n" );
document.write( "data are shown in the following table:<BR>\n" );
document.write( "Drug:    No Help 22 Help 47<BR>\n" );
document.write( "Placebo: No Help 31 Help 20<BR>\n" );
document.write( "What is the probability that:<BR>\n" );
document.write( "a. the participants perceived that their “medication”<BR>\n" );
document.write( "helped if they received the drug?<BR>\n" );
document.write( "Ans: 47/69<BR>\n" );
document.write( "----------------------<BR>\n" );
document.write( "b. the participants perceived that their “medication”<BR>\n" );
document.write( "helped if they received the placebo?<BR>\n" );
document.write( "Ans: 20/51<BR>\n" );
document.write( "----------------------<BR>\n" );
document.write( "c. the participants perceived that their “medication”<BR>\n" );
document.write( "helped?<BR>\n" );
document.write( "Ans: 67/120<BR>\n" );
document.write( "==================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );