document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=352117>Question 352117</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Part-time weekly earnings ($) by college students.<BR>\n" );
document.write( "hours worked (x)                  weekly pay (y)                       <BR>\n" );
document.write( "10                                     93<BR>\n" );
document.write( "15                                     171<BR>\n" );
document.write( "20                                     204<BR>\n" );
document.write( "20                                     156<BR>\n" );
document.write( "35                                     261\r<BR>\n" );
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document.write( "this is the question: a) make an excel scatter plot. what does it suggest about the population correlation between X and Y? b) make an excel worksheet to calculate SSxx,SSyy, and SSxy c) use appendix D to find t.05 for a two-tailored test for zero correlation. d) calculate the t test statistics. can you reject p=0?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #251593 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=251593\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=drawing%28300%2C300%2C-10%2C40%2C-50%2C300%2Cgrid%281%29%2C%0D%0Acircle%2810++++%2C+++++++++++++++++++++++++++++++++93%2C0.8%29%2C%0D%0Acircle%2815+++%2C++++++++++++++++++++++++++++++++++171%2C0.8%29%2C%0D%0Acircle%2820++%2C+++++++++++++++++++++++++++++++++++204%2C0.8%29%2C%0D%0Acircle%2820+%2C++++++++++++++++++++++++++++++++++++156%2C0.8%29%2C%0D%0Acircle%2835%2C+++++++++++++++++++++++++++++++++++++261%2C0.8%29%2C%0D%0Agraph%28300%2C300%2C-10%2C40%2C-50%2C300%2C0%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "b) From my EXCEL spreadsheet,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=xave=20 ALIGN=MIDDLE  ALT=\"xave=20\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=yave=177 ALIGN=MIDDLE  ALT=\"yave=177\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=SSXX=350 ALIGN=MIDDLE  ALT=\"SSXX=350\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=SSYY=15318 ALIGN=MIDDLE  ALT=\"SSYY=15318\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=SSXY=2130 ALIGN=MIDDLE  ALT=\"SSXY=2130\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b1=SSXY%2FSSXX=6.036 ALIGN=MIDDLE  ALT=\"b1=SSXY%2FSSXX=6.036\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b2=SSXY%2FSSYY=0.139 ALIGN=MIDDLE  ALT=\"b2=SSXY%2FSSYY=0.139\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%5E2=b1%2Ab2=0.846 ALIGN=MIDDLE  ALT=\"r%5E2=b1%2Ab2=0.846\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a=yave-b1%2Axave=55.286 ALIGN=MIDDLE  ALT=\"a=yave-b1%2Axave=55.286\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28y=6.036x%2B55.286%29 ALIGN=MIDDLE  ALT=\"highlight%28y=6.036x%2B55.286%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "Regression line plotted with the data.<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=drawing%28300%2C300%2C-10%2C40%2C-50%2C300%2Cgrid%281%29%2C%0D%0Acircle%2810++++%2C+++++++++++++++++++++++++++++++++93%2C0.8%29%2C%0D%0Acircle%2815+++%2C++++++++++++++++++++++++++++++++++171%2C0.8%29%2C%0D%0Acircle%2820++%2C+++++++++++++++++++++++++++++++++++204%2C0.8%29%2C%0D%0Acircle%2820+%2C++++++++++++++++++++++++++++++++++++156%2C0.8%29%2C%0D%0Acircle%2835%2C+++++++++++++++++++++++++++++++++++++261%2C0.8%29%2C%0D%0Agraph%28300%2C300%2C-10%2C40%2C-50%2C300%2C6.036x%2B55.286%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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