document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=316239>Question 316239</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Sum X squared=\r<BR>\n" );
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document.write( "X	2	4	1	5	3<BR>\n" );
document.write( "Y	15	25	10	40	30\r<BR>\n" );
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document.write( "r = \r<BR>\n" );
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document.write( "The r vale indicates:<BR>\n" );
document.write( "a. moderately weak negative correlation between x and y<BR>\n" );
document.write( "b. moderately strong negative correlation between x and y<BR>\n" );
document.write( "c. weak positive correlation between x and y.<BR>\n" );
document.write( "d. strong coorelation between x and y. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #226183 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=226183\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=drawing%28300%2C300%2C+-1%2C6%2C-5%2C45%2C+grid%281%29%2C%0D%0Acircle%282%2C15%2C.23%29%2C%0D%0Acircle%284%2C25%2C.23%29%2C%0D%0Acircle%281%2C10%2C.23%29%2C%0D%0Acircle%285%2C40%2C.23%29%2C%0D%0Acircle%283%2C30%2C.23%29%2C%0D%0Agraph%28300%2C300%2C+-1%2C6%2C-5%2C45%2C+0%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "From graphing the points you see that there is a pretty good linear correlation.<BR>\n" );
document.write( "d) is the correct answer.<BR>\n" );
document.write( "SSXX=10<BR>\n" );
document.write( "SSYY=570<BR>\n" );
document.write( "SSXY=70<BR>\n" );
document.write( "b=SSXY/SSXX=7<BR>\n" );
document.write( "b'=SSXY/SSYY=0.122<BR>\n" );
document.write( "r^2=b*b'=0.86<BR>\n" );
document.write( "a=3<BR>\n" );
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document.write( ".<BR>\n" );
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document.write( ".<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=drawing%28300%2C300%2C+-1%2C6%2C-5%2C45%2C+grid%281%29%2C%0D%0Acircle%282%2C15%2C.23%29%2C%0D%0Acircle%284%2C25%2C.23%29%2C%0D%0Acircle%281%2C10%2C.23%29%2C%0D%0Acircle%285%2C40%2C.23%29%2C%0D%0Acircle%283%2C30%2C.23%29%2C%0D%0Agraph%28300%2C300%2C+-1%2C6%2C-5%2C45%2C+7x%2B3%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( " </SPAN>\n" );
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