document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1194438>Question 1194438</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If a sample of 600 people is selected and the researcher decides to have a maximum error of the<BR>\n" );
document.write( "estimate of 4% on the specific proportion who favor gun control, find the degree of confidence. A<BR>\n" );
document.write( "recent study showed that 50% were in favor of some form of gun control. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #826640 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=826640\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> half-interval is z*sqrt(p*(1-p)/n)=0.04<BR>\n" );
document.write( "p=0.5, z is unknown<BR>\n" );
document.write( "0.04^2=z^2*0.5*0.5/600<BR>\n" );
document.write( "0.0016*600=z^2*0.25<BR>\n" );
document.write( "z^2=3.84<BR>\n" );
document.write( "z=1.96<BR>\n" );
document.write( "95% confidence </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );