document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=923322>Question 923322</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A population is estimated to have a standard deviation of 7. We want to estimate the population mean within 1, with a 98 percent level of confidence.<BR>\n" );
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document.write( "How large a sample is required? (Round up your answer to the next whole number.) \r<BR>\n" );
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document.write( "  Sample required is? .   \r<BR>\n" );
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document.write( "Thank you!!!  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #559985 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=559985\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 98 percent level of confidence<BR>\n" );
document.write( "critical value z =  2.326<BR>\n" );
document.write( "ME = 1 = 2.326(7/sqrt(n))<BR>\n" );
document.write( "1 = 2.326(7/sqrt(n))<BR>\n" );
document.write( "n = (2.326•7)^2 = 265<BR>\n" );
document.write( "round Up to next whole number: 266<BR>\n" );
document.write( "..........<BR>\n" );
document.write( " = CI	z = value<BR>\n" );
document.write( "90%	z =1.645<BR>\n" );
document.write( "92%	z = 1.751<BR>\n" );
document.write( "95%	z = 1.96<BR>\n" );
document.write( "98%	z = 2.326<BR>\n" );
document.write( "99%	z = 2.576<BR>\n" );
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