document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1177087>Question 1177087</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a survey of 250 Voters prior to the election, 16% indicated that they would vote for the ABC candidate. Estimate with 90% confidence the population proportion of voters who support the ABC. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #805366 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=805366\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the half-interval is z(0.95)*sqrt(p*(1-p)/n)<BR>\n" );
document.write( "=1.645*sqrt(.16*.84/250)<BR>\n" );
document.write( "=0.038<BR>\n" );
document.write( "The interval is (0.122, 0.198), equidistant from the point estimate of 16%<BR>\n" );
document.write( "A tree diagram would be very difficult with 250 voters. </SPAN>\n" );
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