document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1158464>Question 1158464</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. <BR>\n" );
document.write( "If the candidate only wants a 8% margin of error at a 90% confidence level, what size of sample is needed? <BR>\n" );
document.write( "Give your answer in whole people.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #781406 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=781406\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .08=z*SE<BR>\n" );
document.write( "0.08=1.645*sqrt((.5*.5)/n), which is the most conservative estimation of the proportion.<BR>\n" );
document.write( "sqrtn)=1.645*sqrt(.5*.5)/0.08=1.645*.5/0.08=10.28<BR>\n" );
document.write( "n=105.70 or 106 people </SPAN>\n" );
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