document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=801855>Question 801855</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a survey of 7000 women, 4431 say they change their polish once a week. Construct a 99% confidence interval for the population proportion of women who change their polish once a week. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #483686 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=483686\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In a survey of 7000 women, 4431 say they change their polish once a week. Construct a 99% confidence interval for the population proportion of women who change their polish once a week.<BR>\n" );
document.write( "-------<BR>\n" );
document.write( "p-hat = 4431/7000 = 0.633<BR>\n" );
document.write( "----<BR>\n" );
document.write( "E = 2.5758*sqrt[0.633*0.367/7000] = 0.0148<BR>\n" );
document.write( "===============<BR>\n" );
document.write( "99% CI: 0.633- 0.0148 < p < 0.633+ 0.0148<BR>\n" );
document.write( "----<BR>\n" );
document.write( "99% CI: 0.6182 < p < 0.6478<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" );