document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=407797>Question 407797</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 700 patrons participated in a poll taken at local bars in Spokane, WA area.  the poll showed that 278 of the patrons used tobacco products.  How large of a sample is necessary if the researchers want to be 98% confident of their results? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #287370 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=287370\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 700 patrons participated in a poll taken at local bars in Spokane, WA area. the poll showed that 278 of the patrons used tobacco products. How large of a sample is necessary if the researchers want to be 98% confident of their results?  I omitted the section that said 98% confident of results within 3.5%.  <BR>\n" );
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document.write( "n = [z/E]^2pq<BR>\n" );
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document.write( "n = [2.326/0.035]^2*(1/2)(1/2)<BR>\n" );
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document.write( "n = [66.46]^2*(1/4)<BR>\n" );
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document.write( "n = 1104.14<BR>\n" );
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document.write( "Round up to n = 1105<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( " </SPAN>\n" );
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