document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=449931>Question 449931</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A retail jewelry store has generated the following regression model for forecasting its total quarterly sales (in thousands of dollars): \r<BR>\n" );
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document.write( "Y3=81.5+4.08t-32.60Q1-16.30Q2+8.15Q3\r<BR>\n" );
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document.write( "This model is developed using a data set that starts in Quarter 4 of 2006  (i.e., the first time period t=1 is associated with Quarter 4 of 2006 ). Use this model to forecast the store's total sales (in thousands of dollars) in Quarter 2 of 2012. \r<BR>\n" );
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document.write( "I have t= 23<BR>\n" );
document.write( "y23= 81.5+4.08(23)-32.6(0)-16.30(1)+8.15(0)=69.39 but is wrong do not know what I did wrong. can someone please help me </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #309593 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=309593\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Y3=81.5+4.08t-32.60Q1-16.30Q2+8.15Q3 <BR>\n" );
document.write( "This model is developed using a data set that starts in Quarter 4 of 2006 (i.e., the first time period t=1 is associated with Quarter 4 of 2006 ). Use this model to forecast the store's total sales (in thousands of dollars) in Quarter 2 of 2012. <BR>\n" );
document.write( "I have t= 23<BR>\n" );
document.write( "y23= 81.5+4.08(23)-32.6(0)-16.30(1)+8.15(0)=69.39 but is wrong do not know what I did wrong. <BR>\n" );
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document.write( "What do you mean by \"Y3\"?<BR>\n" );
document.write( "Is that Y^3 or is it something else?<BR>\n" );
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document.write( "How did you determine that Q1 = 0,<BR>\n" );
document.write( "and that Q2 = 1 and Q3 = 0?<BR>\n" );
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document.write( "Using your numbers I get y23 = 81.5-16.3 = 65.2<BR>\n" );
document.write( "Where did you get 69.39?<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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