document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=281449>Question 281449</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am about to ask MTV viewers the following question: \"Do you regularly watch MTV's Beavis and Butthead?\"  Last week I asked 100 of my friends the same question and 35 of them said yes.<BR>\n" );
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document.write( "How many actual viewers must be surveyed to be 95% confident that the estimate of the viewership is in error by at most 3%? (Assume 100% response rate.)<BR>\n" );
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document.write( "What would be your answer if I had not surveyed any of my friends?<BR>\n" );
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document.write( "Please show details of your work.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #204439 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=204439\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> How many actual viewers must be surveyed to be 95% confident that the estimate of the viewership is in error by at most 3%? (Assume 100% response rate.)<BR>\n" );
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document.write( "n = [zs/E]^2<BR>\n" );
document.write( "n = [1.96*s/0.03]^2<BR>\n" );
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document.write( "You would need to know the standard deviation<BR>\n" );
document.write( "of the distribution.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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