document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=607281>Question 607281</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Need help, I cant get the basis for this one. \r<BR>\n" );
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document.write( "The marketing manager of a large supermarket chain would like to use shelf space to predict the sales of pet food. For a random sample of 12 similar stores, she gathered the following information regarding the shelf space, in feet, devoted to pet food and the weekly sales in hundreds of dollars.<BR>\n" );
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document.write( " Store        1    2    3    4    5    6    7    8    9    10   11   12<BR>\n" );
document.write( " Shelf Space  5    5    5    10   10   10   15   15   15   20   20   20<BR>\n" );
document.write( " Weekly Sales 1.6  2.2  1.4  1.9  2.4  2.6  2.3  2.7  2.8  2.6  2.9  3.1 \r<BR>\n" );
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document.write( "1)  Compute the value of the sample correlation coefficient between weekly sales and shelf space. \r<BR>\n" );
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document.write( "possible answers: A. 0.684 ; B. 0.827 ; C. 0.652 ; D. 0.308 <BR>\n" );
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document.write( "Thank you<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #382617 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=382617\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">   <PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\"><font face = \"Tohoma\" size = 4 color = \"indigo\"><b> <BR>\n" );
document.write( "Hi,<BR>\n" );
document.write( "Shelf Space 5 5 5 10 10 10 15 15 15 20 20 20<BR>\n" );
document.write( " Weekly Sales 1.6 2.2 1.4 1.9 2.4 2.6 2.3 2.7 2.8 2.6 2.9 3.1 <BR>\n" );
document.write( "correlation coefficient between weekly sales and shelf space is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28.827%29 ALIGN=MIDDLE  ALT=\"highlight%28.827%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Highly recommend the Excel's CORREL function <BR>\n" );
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