document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1184847>Question 1184847</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A political candidate has asked you to conduct a poll to determine what percentage of people support her.\r<BR>\n" );
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document.write( "If the candidate only wants a 4% margin of error at a 98% confidence level, what size of sample is needed?\r<BR>\n" );
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document.write( "The political candidate will need to sample_____ people. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #815526 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=815526\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> error=z(0.99)*sqrt(p*(1-p))/n<BR>\n" );
document.write( "let p=0.5 most conservative<BR>\n" );
document.write( "0.04=2.326*sqrt(0.5*0.5/n)<BR>\n" );
document.write( "square both sides<BR>\n" );
document.write( "0.0016-5.41*0.25/n<BR>\n" );
document.write( "n=5.41*0.25/0.0016<BR>\n" );
document.write( "=845.31 or 846<BR>\n" );
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