document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=427710>Question 427710</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A researcher collected sample data for 12 women ages 18 to 24. The sample had a mean serum cholesterol level (measured in mg/100 mL) of 189.9 , with a standard deviation of 5.5. Assuming that serum cholesterol levels for women ages 18 to 24 are normally distributed, find a 99% confidence interval for the mean serum cholesterol level of all women in this age group.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #297433 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=297433\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A researcher collected sample data for 12 women ages 18 to 24. <BR>\n" );
document.write( "The sample had a mean serum cholesterol level (measured in mg/100 mL) of 189.9 , with a standard deviation of 5.5. <BR>\n" );
document.write( "Assuming that serum cholesterol levels for women ages 18 to 24 are normally distributed, find a 99% confidence interval for the mean serum cholesterol level of all women in this age group.<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x-bar = 189.9<BR>\n" );
document.write( "ME = 2.5758*5.5/sqrt(12) = 4.40897<BR>\n" );
document.write( "---<BR>\n" );
document.write( "99%CI: 189.9-4.40897 < u < 189.9+4.40897<BR>\n" );
document.write( "99%CI: 185.81 < u < 194.30897<BR>\n" );
document.write( "=================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "========= </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );