document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=715968>Question 715968</A>: <I><SPAN STYLE=\"word-break: break-all;\"> For sample mean x = 150, sample size n = 36 and sample standard deviation s = 40 find 80% confidence interval for population mean.  Population standard deviation is not known, you should use formula on page 328 with  t-value from Appendix Table IV (use column  t0.10).  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #439677 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=439677\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> For sample mean x = 150, sample size n = 36 and sample standard deviation s = 40 find 80% confidence interval for population mean. Population standard deviation is not known, you should use formula on page 328 with t-value <BR>\n" );
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document.write( "x-bar = 150<BR>\n" );
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document.write( "E = t*s/sqrt(n) = 1.3062*40/sqrt(36) = 8.708<BR>\n" );
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document.write( "80% CI: 150-8.708 < u < 150+8.708<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "============== </SPAN>\n" );
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