document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1158503>Question 1158503</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose you record the time spent for lunch for seven days and the results are: 10, 13, 15, 13, 16, 21, and 18 minutes. If the population (all days) is normally distributed, construct a 98% confidence interval for the population mean. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #781534 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=781534\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 98%CI is mean +/-t(0.99, df=6)*s/sqrt(n)<BR>\n" );
document.write( "15.14 is mean, s=3.63, n=7<BR>\n" );
document.write( "t=3.143<BR>\n" );
document.write( "interval half width is 4.31 (margin of error)<BR>\n" );
document.write( "(10.83, 19.45)<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );