document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=137662>Question 137662</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The breaking point of a cable has a standard deviation of 90 lbs.  A rndom sample of 90 newly manufactured cables has a mean breaking strnegth of 1900 lbs.  Based on tis sample, find a 95% confidnence interval for the true mean.<BR>\n" );
document.write( "What is the lower limit of the 95% conidence interval<BR>\n" );
document.write( "What is the upper limit of the 95% confidence internal<BR>\n" );
document.write( "THan you </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #100737 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=100737\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The breaking point of a cable has a standard deviation of 90 lbs.  A random sample of 90 newly manufactured cables has a mean breaking strength of 1900 lbs.  Based on tis sample, find a 95% confidnence interval for the true mean.<BR>\n" );
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document.write( "x-bar = 1900<BR>\n" );
document.write( "E = 1.96[90/sqrt(90)] = 18.5942<BR>\n" );
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document.write( "What is the lower limit of the 95% confidence interval: 1900-18.5942=1881.4058<BR>\n" );
document.write( "What is the upper limit of the 95% confidence internal: 1900+18.5942=1918.5942<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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