document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=441929>Question 441929</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A study of 60 bolts of carpet showed that their average length was 150 yards. The standard deviation of the population is 10 yards. Which of the foloowing is the 99% confidence interval for the mean length per bolt of carpet?<BR>\n" );
document.write( "(Please write out so I can learn how to answer this problem.) Thanks! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #304887 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=304887\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A study of 60 bolts of carpet showed that their average length was 150 yards. The standard deviation of the population is 10 yards. Which of the following is the 99% confidence interval for the mean length per bolt of carpet?<BR>\n" );
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document.write( "x-bar = 150<BR>\n" );
document.write( "ME = 2.5758*10/sqrt(60) = 3.3254<BR>\n" );
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document.write( "99% CI: 150-3.3254 < u < 150+3.3254<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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