document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1168607>Question 1168607</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Listed below are speeds​ (mi/h) measured from traffic on a busy highway. This simple random sample was obtained at​ 3:30 P.M. on a weekday. Use the sample data to construct  ​95% confidence interval estimate of the population standard deviation.<BR>\n" );
document.write( "62,63,63,56,63,52,61,60,61,69,60,66<BR>\n" );
document.write( "Need to find <BR>\n" );
document.write( "The confidence interval is   mi/h < o <  mi/h </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #793272 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=793272\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> mean is 61.33<BR>\n" );
document.write( "s=4.36<BR>\n" );
document.write( "95% CI has margin of error of t(0.975, df=11)*s/sqrt(12)<BR>\n" );
document.write( "this is 2.201*4.36/sqrt(12)=2.770<BR>\n" );
document.write( "the CI is (58.63, 64.03) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );