document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1193405>Question 1193405</A>: <I><SPAN STYLE=\"word-break: break-all;\"> You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately  <BR>\n" );
document.write( "p<BR>\n" );
document.write( "∗<BR>\n" );
document.write( "=<BR>\n" );
document.write( "64<BR>\n" );
document.write( "%<BR>\n" );
document.write( " . You would like to be 95% confident that your esimate is within 3% of the true population proportion. How large of a sample size is required? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #825428 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=825428\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> error=z(0.975)*sqrt(p*(1-p)/n)<BR>\n" );
document.write( "0.03=1.96*sqrt*(0.64*0.36)/n<BR>\n" );
document.write( "square both sides<BR>\n" );
document.write( "0.0009=3.8416*0.2304/n<BR>\n" );
document.write( "n=983.44 or 984 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );