document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1207861>Question 1207861</A>: <I><SPAN STYLE=\"word-break: break-all;\"> To estimate with 95% confidence the average number of kilometres that students living off-campus commute to classes every day, a random sample of 20 students was taken and produced a mean equal to 5.2 km and a standard deviation of 3.05 km. Under these circumstances, what is the appropriate critical value?<BR>\n" );
document.write( "a) 2.093<BR>\n" );
document.write( "b) 1.960    <BR>\n" );
document.write( "c) 2.086<BR>\n" );
document.write( "d) 1.729 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #846286 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=846286\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> For 95% confidence look at at a t-table (because it is a sample) and frankly the easiest way is to look for the column where it is just more than 1.96 at df=19.  That is 2.093 </SPAN>\n" );
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