document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=59559>Question 59559</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Here is the problem and I honestly am not sure  what to do. Is Sample size all voters in U.S or there is a computation to be done? \r<BR>\n" );
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document.write( " A New York Times article about Poll results states, \"In theory, in 19 cases out of 20, the results from such a poll should differ by no more than one percentage point in either direction from what would have been obtained by interviewing all voters in the United States. Find the sample size suggested by this statement. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #40827 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=40827\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A New York Times article about Poll results states, \"In theory, in 19 cases out of 20, the results from such a poll should differ by no more than one percentage point in either direction from what would have been obtained by interviewing all voters in the United States. Find the sample size suggested by this statement.<BR>\n" );
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document.write( "The formula for sample size is n=[z^*sigma/E]^2<BR>\n" );
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document.write( "You want n.<BR>\n" );
document.write( "You have the following information:<BR>\n" );
document.write( "\"19 out of 20\" indicates you want a 95% confidence result which means <BR>\n" );
document.write( "z^*=2.5758...<BR>\n" );
document.write( "\"differ no more than one percentage point\" means E=0.01<BR>\n" );
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document.write( "Missing information:<BR>\n" );
document.write( "You are missing the value of sigma.<BR>\n" );
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document.write( "If you have sigma you can calculate n.<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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