document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1093247>Question 1093247</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the sample&#8203; size, n, needed to estimate the percentage of adults who have consulted fortune tellers. Use a 0.01 margin of&#8203; error, use a confidence level of 95&#8203;% and use results from a prior poll suggesting that 16&#8203;% of adults have consulted fortune tellers.\r<BR>\n" );
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document.write( "(Round up to the nearest&#8203; integer.) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #707932 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=707932\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the half interval of a confidence interval is z*sqrt(p*(1-p))/n=0.01, the margin of error.<BR>\n" );
document.write( "substitute<BR>\n" );
document.write( "1.96*sqrt [(0.16*0.84)/n]=0.01<BR>\n" );
document.write( "square both sides, multiply by n.<BR>\n" );
document.write( "3.84*0.16*0.84=0.0001n=0.5161<BR>\n" );
document.write( "divide by 0.0001<BR>\n" );
document.write( "n=5161 </SPAN>\n" );
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