document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1120223>Question 1120223</A>: <I><SPAN STYLE=\"word-break: break-all;\"> #1<BR>\n" );
document.write( "You measure 28 textbooks' weights, and find they have a mean weight of 41 ounces. Assume the population standard deviation is 11.9 ounces. Based on this, construct a 99% confidence interval for the true population mean textbook weight.\r<BR>\n" );
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document.write( "Give your answers as decimals, to two places\r<BR>\n" );
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document.write( "_____< &#956; < _____ </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #735935 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=735935\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The half-interval is z(0.995)*sigma/sqrt(n)<BR>\n" );
document.write( "=2.576*11.9/sqrt(28)<BR>\n" );
document.write( "=5.79<BR>\n" );
document.write( "This is added and subtracted to the mean, so the interval is (35.21 oz, 46.79 oz.) </SPAN>\n" );
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