document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=138863>Question 138863</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/9780072966930/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> 12.47 Regression analysis of free throws by 29 NBA teams during the 2002–2003 season revealed the fitted regression Y = 55.2 + .73X (R2 = .874, syx = 53.2) where Y = total free throws made and X = total free throws attempted. The observed range of X was from 1,620 (New York Knicks) to 2,382 (Golden State Warriors). (a) Find the expected number of free throws made for a team that shoots 2,000 free throws. (b) Do you think that the intercept is meaningful? Hint: Make a scatter plot and let Excel fit the line. (c) Use the quick rule to make a 95 percent prediction interval for Y when X = 2,000. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #101331 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=101331\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Regression analysis of free throws by 29 NBA teams during the 2002–2003 season revealed <BR>\n" );
document.write( "the fitted regression Y(X) = 55.2 + .73X <BR>\n" );
document.write( "(R2 = .874, syx = 53.2) <BR>\n" );
document.write( "where Y = total free throws made <BR>\n" );
document.write( "and X = total free throws attempted.<BR>\n" );
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document.write( "The observed range of X was from 1,620 (New York Knicks) to 2,382 (Golden State Warriors). <BR>\n" );
document.write( "(a) Find the expected number of free throws made for a team that shoots 2,000 free throws.<BR>\n" );
document.write( "Y(X) = 55.2 + .73X <BR>\n" );
document.write( "Y(2000) = 55.2 + 0.73*2000 = 1515,2<BR>\n" );
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document.write( "(b) Do you think that the intercept is meaningful?<BR>\n" );
document.write( "The intercept says 55.2 free throws will be made when zero free throws <BR>\n" );
document.write( "are attempted.  Hardly realistic.<BR>\n" );
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document.write( "Hint: Make a scatter plot and let Excel fit the line. <BR>\n" );
document.write( "(c) Use the quick rule to make a 95 percent prediction interval for Y when X = 2,000.<BR>\n" );
document.write( "I'm not familiar with the \"Quick Rule\".<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
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