document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1040406>Question 1040406</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the 95% confidence interval for the standard deviation of the lengths of pipes if a sample of 11 pipes has a standard deviation of 12 inches. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #655390 by </B><A HREF=/tutors/aboutme.mpl?userid=robertb><B>robertb(5830)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=robertb><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=robertb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=655390\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> [<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28%28%28n-1%29s%5E2%29%2FX%5E2%5Balpha%2F2%5D%29 ALIGN=MIDDLE  ALT=\"sqrt%28%28%28n-1%29s%5E2%29%2FX%5E2%5Balpha%2F2%5D%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28%28%28n-1%29s%5E2%29%2FX%5E2%5B1-alpha%2F2%5D%29 ALIGN=MIDDLE  ALT=\"sqrt%28%28%28n-1%29s%5E2%29%2FX%5E2%5B1-alpha%2F2%5D%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > ]\r<BR>\n" );
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document.write( "=[<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28%2810%2A12%5E2%29%2FX%5E2%5B0.025%5D%29 ALIGN=MIDDLE  ALT=\"sqrt%28%2810%2A12%5E2%29%2FX%5E2%5B0.025%5D%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28%2810%2A11%5E2%29%2FX%5E2%5B0.975%5D%29 ALIGN=MIDDLE  ALT=\"sqrt%28%2810%2A11%5E2%29%2FX%5E2%5B0.975%5D%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > ]\r<BR>\n" );
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document.write( "=[<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%281440%2F20.483%29 ALIGN=MIDDLE  ALT=\"sqrt%281440%2F20.483%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%281440%2F3.247%29 ALIGN=MIDDLE  ALT=\"sqrt%281440%2F3.247%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > ]\r<BR>\n" );
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document.write( "= [8.38, 21.06]\r<BR>\n" );
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document.write( "where <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=X%5E2%5Balpha%2F2%5D+ ALIGN=MIDDLE  ALT=\"X%5E2%5Balpha%2F2%5D+\"   DISABLED_style= \"max-width:90%; height:auto;\" > is the chi-square distribution with df 11-1 = 10 and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=alpha+=+0.05 ALIGN=MIDDLE  ALT=\"alpha+=+0.05\"   DISABLED_style= \"max-width:90%; height:auto;\" >. </SPAN>\n" );
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