document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1155771>Question 1155771</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The daily salaries of substitute teachers for 8 local school districts are shown below. Find the<BR>\n" );
document.write( "95% confidence interval for the mean of the salaries.<BR>\n" );
document.write( "$60 $56 $60 $55 $70 $55 $60 $55 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #778551 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=778551\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> mean=58.875<BR>\n" );
document.write( "s=5.08<BR>\n" );
document.write( "t 0.975, df=7 =  2.365. <BR>\n" );
document.write( "half-interval is t s/sqrt(n)=2.365*5.08/sqrt(8)=4.25\r<BR>\n" );
document.write( "\n" );
document.write( "That is added and subtracted from the mean to get the interval<BR>\n" );
document.write( "($54.625, $63.125)<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );