document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1158205>Question 1158205</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A random sample of 42 college graduates revealed that they worked an average of 5.5 years on the job before being promoted. The sample standard deviation was 1.1 years. Using the 0.99 degree of confidence, what is the confidence interval for the population mean?.....A. 5.04 and 5.96<BR>\n" );
document.write( "B. 5.06 and 5.94<BR>\n" );
document.write( "C. 2.67 and 8.33<BR>\n" );
document.write( "D. 4.40 and 6.6 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #781110 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=781110\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> half-interval is t(0.995)*s/sqrt(n)<BR>\n" );
document.write( "=2.70*1.1/sqrt(42)=0.458 is half interval so full interval is 0.916<BR>\n" );
document.write( "(5.04, 5.96)<BR>\n" );
document.write( "A. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );