document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=437870>Question 437870</A>: <I><SPAN STYLE=\"word-break: break-all;\">  A study was done to determine the proportion of voters that feel that their local government is doing an adequate job. Of the 150 voters surveyed, 120 feel  that their local government is doing an adequate job. Calculate 99% confidence interval for the true proporation of voters that feel that their government is doing an adequate job. \r<BR>\n" );
document.write( "\n" );
document.write( "I dont feel that their is enough information to start this problem up. Can you please help me to set this up. THanks so much </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #302885 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=302885\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A study was done to determine the proportion of voters that feel that their local government is doing an adequate job. Of the 150 voters surveyed, 120 feel that their local government is doing an adequate job. Calculate 99% confidence interval for the true proporation of voters that feel that their government is doing an adequate job<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Amazingly, that is all the info you need.<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "p-hat = 120/150 = 4/5 = 0.8<BR>\n" );
document.write( "---<BR>\n" );
document.write( "ME = zs = 2.5758*sqrt[0.8*0.2/150] = 0.08413<BR>\n" );
document.write( "---<BR>\n" );
document.write( "99%CI: 0.8-0.08413 < p < 0.8+0.08413<BR>\n" );
document.write( "99%CI: 0.7159 < p < 0.88413<BR>\n" );
document.write( "=====================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "============ </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );