document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1053144>Question 1053144</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A private opinion poll is conducted for a politician to determine what proportion of the population favors adding more national parks. How large a sample is needed in order to be 90% confident that the sample proportion will not differ from the true proportion by more than 6%?\r<BR>\n" );
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document.write( "How can I solve this with a calculator? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #668437 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=668437\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ME =<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+z%2Asigma%2Fsqrt%28n%29 ALIGN=MIDDLE  ALT=\"+z%2Asigma%2Fsqrt%28n%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "0r<BR>\n" );
document.write( "n = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28z%2Asigma%2FME%29%5E2 ALIGN=MIDDLE  ALT=\"+%28z%2Asigma%2FME%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "ME = .06<BR>\n" );
document.write( "z = 1.645<BR>\n" );
document.write( "  = CI	z = value<BR>\n" );
document.write( "90%	z =1.645<BR>\n" );
document.write( "92%	z = 1.751<BR>\n" );
document.write( "95%	z = 1.96<BR>\n" );
document.write( "98%	z = 2.326<BR>\n" );
document.write( "99%	z = 2.576<BR>\n" );
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