document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1114842>Question 1114842</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a recent presidential election, 611 voters were surveyed and 308 of them said that they voted for the candidate who won (based on data from the ICR Survey Research Group). Find a 99% confidence interval estimate of the percentage of voters who said that they voted for the candidate who won. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #729754 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=729754\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In a recent presidential election, 611 voters were surveyed and 308 of them said that they voted for the candidate who won (based on data from the ICR Survey Research Group). Find a 99% confidence interval estimate of the percentage of voters who said that they voted for the candidate who won.<BR>\n" );
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document.write( "sample proportion:: 308/611 = 0.5041<BR>\n" );
document.write( "ME = z*sqrt(pq/n) = 2.5758*sqrt[(308/611)*(303/611)/611] = 0.0521<BR>\n" );
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document.write( "99% CI: 0.5041-0.0521 < p < 0.5041+0.0521<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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