document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=466794>Question 466794</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a survey, the planning value for the population proportion is p*= 0.35 . How large a sample should be taken to provide a 95 per cent confidence interval with a margin of error  of 0.05 ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #320164 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=320164\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In a survey, the planning value for the population proportion is p*= 0.35 . How large a sample should be taken to provide a 95 per cent confidence interval with a margin of error of 0.05 ?<BR>\n" );
document.write( "--------<BR>\n" );
document.write( "n = [z/E]^2*pq<BR>\n" );
document.write( "---<BR>\n" );
document.write( "n = [1.96/0.05]^2*0.35*0.65 = 350 when rounded up<BR>\n" );
document.write( "===============<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );