document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1184866>Question 1184866</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A population mean is to be estimated from the sample described. Round your answer to one decimal place if necessary. Assume that all confidence intervals use a 95% confidence level.\r<BR>\n" );
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document.write( "Sample size = 3025, sample mean = 244, sample standard deviation = 80<BR>\n" );
document.write( "What is the margin of error?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #815524 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=815524\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the margin of error is t(0.975, df=3024) which is essentially 1.96, the z-value * 80/sqrt(3025)\r<BR>\n" );
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document.write( "=1.96*80/55=2.85 is margin of error\r<BR>\n" );
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