document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1189027>Question 1189027</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A sample of 2,500 people was asked how many cups of coffee they drink in the morning. You are given the following sample information.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Cups of Coffee	Frequency<BR>\n" );
document.write( "0	700	<BR>\n" );
document.write( "1	900	<BR>\n" );
document.write( "2	600	<BR>\n" );
document.write( "3	300	<BR>\n" );
document.write( " 	2,500	<BR>\n" );
document.write( "The variance of the number of cups of coffee is _____. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #820322 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=820322\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "0+900+1200+900=3000 cups divided by 2500 people=1.2 cups for the mean,<BR>\n" );
document.write( "Variance is sum of squared deviations from the mean<BR>\n" );
document.write( "1.44*700+0.04*900+0.64*600+3.24*300=2400<BR>\n" );
document.write( "divide by 2500, and variance is 0.96 cups^2, calling this a population, although it is also the same for a sample.<BR>\n" );
document.write( "Calculator: L1 IS 0,1,2,3; L2 is 700,900,600,300<BR>\n" );
document.write( "Then 1-variable stats L1,L2 enter<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );