document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1001739>Question 1001739</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Finding confidence intervals.<BR>\n" );
document.write( "Find the margin of error and the confidence interval for the population mean. Assume that the population has a normal distribution.<BR>\n" );
document.write( "Math SAT scores for women: 95% confidence, n = 15, xbar = 496, s = 108 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #618845 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=618845\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This is a t-distribution, so 95% CI for t(df=14) is <BR>\n" );
document.write( "496 +/- 2.145(108/sqrt(15); mean +/- t-value *SE, where SE= s/sqrt(n)<BR>\n" );
document.write( "the SE here is 27.89.  Without rounding until the end, the CI=496+/-59.81<BR>\n" );
document.write( "(436.19, 555.81).  </SPAN>\n" );
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