document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=923654>Question 923654</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The estimate of the population proportion is to be within plus or minus .07, with a 98 percent level of confidence. The best estimate of the population proportion is .20. How large a sample is required? \r<BR>\n" );
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document.write( "sample size? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #560215 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=560215\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ME = .07, .07, with a 98 percent level of confidence<BR>\n" );
document.write( "p = .20<BR>\n" );
document.write( "ME = .07 = 2.326(sqrt(.20*.80/n))<BR>\n" );
document.write( "n = p(1-p)(z/E)^2<BR>\n" );
document.write( "n = .16(2.326/.07)^2 = 177 rounded Up to the next Whole Number </SPAN>\n" );
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