document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1120154>Question 1120154</A>: <I><SPAN STYLE=\"word-break: break-all;\"> #8<BR>\n" );
document.write( "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 6% margin of error at a 90% confidence level, what size of sample is needed?\r<BR>\n" );
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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 #735846 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=735846\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> error = +/- z*sqrt p*(1-p)/n<BR>\n" );
document.write( "0.06=1.645*sqrt (0.25)/n<BR>\n" );
document.write( "0.06=1.645*0.5/sqrt (n)<BR>\n" );
document.write( "0.06 sqrt (n)=0.8225<BR>\n" );
document.write( "divide by 0.06 both sides and square<BR>\n" );
document.write( "n=187.92 or 188 </SPAN>\n" );
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