document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1180592>Question 1180592</A>: <I><SPAN STYLE=\"word-break: break-all;\"> You measure 42 randomly selected textbooks' weights, and find they have a mean weight of 52 ounces. Assume the population standard deviation is 14.8 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 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #810317 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=810317\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 99% CI half-interval is z*(0.995)*sigma/sqrt(n)<BR>\n" );
document.write( "=2.576*14.8/sqrt(42)<BR>\n" );
document.write( "=5.88<BR>\n" );
document.write( "that is added to and subtracted from the mean<BR>\n" );
document.write( "(46.12, 57.88) units oz. </SPAN>\n" );
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