document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1058876>Question 1058876</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A STAT 200 instructor believes that the average quiz score is a good predictor of final exam<BR>\n" );
document.write( "score. A random sample of 10 students produced the following data where x is the average quiz<BR>\n" );
document.write( "score and y is the final exam score.\r<BR>\n" );
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document.write( "x 80 50 60 100 70 85 40 65 75 80<BR>\n" );
document.write( "y 72 75 65 90 60 85 50 60 75 90\r<BR>\n" );
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document.write( "(a) Find an equation of the least squares regression line. Show all work; writing the correct<BR>\n" );
document.write( "equation, without supporting work, will receive no credit.<BR>\n" );
document.write( "(b) Based on the equation from part (a), what is the predicted final exam score if the average quiz<BR>\n" );
document.write( "score is 90? Show all work and justify your answer.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #674467 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=674467\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Using EXCEL,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=0.5984x%2B30.014 ALIGN=MIDDLE  ALT=\"y=0.5984x%2B30.014\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "..<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/display-illustration.mpl?tutor=Fombitz&illustration_name=NL6.JPG\">.<BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=0.5984%2890%29%2B30.014 ALIGN=MIDDLE  ALT=\"y=0.5984%2890%29%2B30.014\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=53.856%2B30.014 ALIGN=MIDDLE  ALT=\"y=53.856%2B30.014\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=83.87 ALIGN=MIDDLE  ALT=\"y=83.87\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "or rounding up,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=84 ALIGN=MIDDLE  ALT=\"y=84\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );