document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1016642>Question 1016642</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A Sample consists of 75 television sets purchased several years ago. The replacement rimes of those TV sets have a mean of 8.2 years and use 1.1 as standard deviation.\r<BR>\n" );
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document.write( "Construct and interpret a 90% confidence interval for the mean replacement time of all TV sets from that ear ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #633028 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=633028\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> mean=8.2<BR>\n" );
document.write( "sd=1.1<BR>\n" );
document.write( "n=75<BR>\n" );
document.write( "t0.95 df=74 is 1.66<BR>\n" );
document.write( "90% CI is +/- 1.66*(1.1/sqrt(75))<BR>\n" );
document.write( "=+/-0.2108<BR>\n" );
document.write( "(7.99,8.41) </SPAN>\n" );
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