document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=236227>Question 236227</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 6.  Dewey, Cheetum, and Howe is a law firm that handles divorce cases.  A previous study showed that in 34% of the time, their client  got everything that was requested in the initial divorce papers.  How many divorce proceedings would they have to survey to construct a 99% confidence interval for the true proportion of their clients get everything that they wanted in the divorce?  If this interval is high enough, it would be a great advertising piece of information. \r<BR>\n" );
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document.write( "I have no idea where to start please help me. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #173934 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=173934\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Dewey, Cheetum, and Howe is a law firm that handles divorce cases. A previous study showed that in 34% of the time, their client got everything that was requested in the initial divorce papers. How many divorce proceedings would they have to survey to construct a 99% confidence interval for the true proportion of their clients get everything that they wanted in the divorce? If this interval is high enough, it would be a great advertising piece of information. <BR>\n" );
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document.write( "n = [z*s/E]^2<BR>\n" );
document.write( "s = sqrt[pq/n]<BR>\n" );
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document.write( "n = [2.5758*sqrt(0.34*0.66)/0.01]^2<BR>\n" );
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document.write( "n = 122.02^2<BR>\n" );
document.write( "n = 14888.7<BR>\n" );
document.write( "Rounding up n = 14889<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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