document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=161632>Question 161632</A>: <I><SPAN STYLE=\"word-break: break-all;\"> CAN SOMEONE HELP ME WITH THIS PROBLEM:\r<BR>\n" );
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document.write( "Use technology to compute r, the correlation coefficient.<BR>\n" );
document.write( "The following are costs of advertising ( in thousands of dollars) and the number of products sold (in thousands):\r<BR>\n" );
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document.write( "Costs   9,    2,    3,    4,    2,    5,    9,    10<BR>\n" );
document.write( "Number  85,   52,   55,   68,   67,   86,   83,   73\r<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 #119128 by </B><A HREF=/tutors/aboutme.mpl?userid=gonzo><B>gonzo(654)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=gonzo><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=119128\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> i went online to find a correlation coefficient calculator.<BR>\n" );
document.write( "found one on<BR>\n" );
document.write( "http://www.fon.hum.uva.nl/Service/Statistics/Correlation_coefficient.html<BR>\n" );
document.write( "entered the data as you described it.<BR>\n" );
document.write( "9 85<BR>\n" );
document.write( "2 52<BR>\n" );
document.write( "3 55<BR>\n" );
document.write( "4 68<BR>\n" );
document.write( "2 67<BR>\n" );
document.write( "5 86<BR>\n" );
document.write( "9 83<BR>\n" );
document.write( "10 73<BR>\n" );
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document.write( "answer i got is<BR>\n" );
document.write( "R = 0.7077, p <= 0.055 (t = 2.454, DF = 6)<BR>\n" );
document.write( "y = 2.788 * x + 55.79<BR>\n" );
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document.write( "looks like your R factor is .7077.<BR>\n" );
document.write( "probability of error is <= 0.055.<BR>\n" );
document.write( "t factor is 2.454 with 6 degrees of freedom.<BR>\n" );
document.write( "equation of the regression line is<BR>\n" );
document.write( "y = 2.788 * x + 55.79<BR>\n" );
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document.write( "neat tool.<BR>\n" );
document.write( "real easy to use.\r<BR>\n" );
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