document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=474843>Question 474843</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the sample size necessary to achieve the following:Margin of error E=0.005, confidence level=99%, when the p is unknown. Again, assume this is an estimation of th population proportoin </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #325667 by </B><A HREF=/tutors/aboutme.mpl?userid=robertb><B>robertb(5830)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=robertb><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=robertb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=325667\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The margin of error is approximately given by \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2.575%2Asqrt%28%28%281%2F2%29%281%2F2%29%29%2Fn%29+=+2.575%2A%281%2F%282sqrt%28n%29%29%29+=+1.2875%2Fsqrt%28n%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >, where <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2.575+=+z%5B0.995%5D ALIGN=MIDDLE  ALT=\"2.575+=+z%5B0.995%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "when the parameter p is unknown.  \r<BR>\n" );
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document.write( "==> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.005+=+1.2875%2Fsqrt%28n%29 ALIGN=MIDDLE  ALT=\"0.005+=+1.2875%2Fsqrt%28n%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or n = 66,306.25.<BR>\n" );
document.write( "So sample size must be at least 66,307. </SPAN>\n" );
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