document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1187312>Question 1187312</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If n = 500 and p^(p-hat) = 0.8, construct a 90% confidence interval </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #819204 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=819204\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the 90% half-interval is z(0.95)*sqrt(p(1-p)/n); p=0.8,1-p=0.2, n=500.<BR>\n" );
document.write( "=1.645*sqrt(.16/500)<BR>\n" );
document.write( "=0.0294<BR>\n" );
document.write( "add to and subtract that from phat<BR>\n" );
document.write( "(0.7706, 0.8294) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );