document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1148673>Question 1148673</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Construct a confidence interval for the population mean using a t-distribution: c = 99% m = 16.7  s = 3.2  n = 20. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #770048 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=770048\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> t df=19,0.995=2.86093\r<BR>\n" );
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document.write( "half-interval is t*s/sqrt(n)=2.861*3.2/sqrt(20)=2.047<BR>\n" );
document.write( "this is added and subtracted to the mean for the CI.<BR>\n" );
document.write( "(14.653, 18.747) or (14.6, 18.7) </SPAN>\n" );
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