document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=114506>Question 114506</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 9.	The paired data below consist of the test scores of 6 randomly selected students and the number of hours they studied for a test.  Find the value of the linear correlation coefficient, r.<BR>\n" );
document.write( "Hours studied	5	10	4	6	10	9<BR>\n" );
document.write( "Test score	64	86	69	86	59	87<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #83307 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=83307\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Using the TI-83 LinReg function I get r = 0.2242..<BR>\n" );
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document.write( "If you want to do it by hand:<BR>\n" );
document.write( "Find the mean of the x values = x-bar<BR>\n" );
document.write( "Find the mean of the y values =y-bar<BR>\n" );
document.write( "Find the std dev of the x values = sx<BR>\n" );
document.write( "Find the std dev of the y values = sy<BR>\n" );
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document.write( "Find the sum of the products [(x - x-bar)(y - y-bar)]/sxsy<BR>\n" );
document.write( "for each x/y pair.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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