document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=919415>Question 919415</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The mean value of land and buildings per acre from a sample of farms is $1200, with a standard deviation of $300. The data set has a bell-shaped distribution. Assume the number of farms in the sample is 72.\r<BR>\n" );
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document.write( "Use the empirical rule to estimate the number of farms whose land and building values per acre are between $600 and $1800. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #557718 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=557718\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> mean =  $1200, with a standard deviation of $300.<BR>\n" );
document.write( "$600 < x < $1800<BR>\n" );
document.write( "2Sds on either side of mean<BR>\n" );
document.write( "one  standard deviation from the mean accounts for about 68% of the set <BR>\n" );
document.write( "two standard deviations from the mean account for about 95% ****<BR>\n" );
document.write( "and three standard deviations from the mean account for about 99.7%.<BR>\n" );
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