document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=270053>Question 270053</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If we use values beyond our data set then<BR>\n" );
document.write( "		a. the predicted value can be wrong<BR>\n" );
document.write( "		b.  the linear model may not fit the trend <BR>\n" );
document.write( "		c.  A & B<BR>\n" );
document.write( "9.  When we find a variable that is statically significant<BR>\n" );
document.write( "		a. it allows us to build a model for estimating points <BR>\n" );
document.write( "		b.  it can referred to as a “driver” of the change<BR>\n" );
document.write( "		c.  A & B<BR>\n" );
document.write( "		d.  it is important based on Bohme’s theory of significance<BR>\n" );
document.write( "10.A point estimate for 8 units is<BR>\n" );
document.write( "a.	8<BR>\n" );
document.write( "b.	6.5<BR>\n" );
document.write( "c.	7.36<BR>\n" );
document.write( "11.	A confidence interval for a sample average of 8 units  <BR>\n" );
document.write( "a.	4.72   to 9.56<BR>\n" );
document.write( "b.	4.03 to 8.97<BR>\n" );
document.write( "c.	-1.05 to 14.05<BR>\n" );
document.write( "d.	 1.15  to 14.05\r<BR>\n" );
document.write( "\n" );
document.write( "12.	A confidence interval for a individual point  of 8 units<BR>\n" );
document.write( "a.	4.72   to 9.56<BR>\n" );
document.write( "b.	4.03 to 8.97<BR>\n" );
document.write( "c.	-1.05 to 14.05<BR>\n" );
document.write( "d.	 1.15  to 14.05\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #197880 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=197880\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The regression equation is<BR>\n" );
document.write( "Sales1 = - 0.86 + 0.920 Units\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Predictor    Coef  SE Coef      T      P<BR>\n" );
document.write( "Constant   -0.864    3.265  -0.26  0.799<BR>\n" );
document.write( "Units      0.9203   0.4219   2.18  0.066\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "S = 3.76362   R-Sq = 40.5%   R-Sq(adj) = 32.0%\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Analysis of Variance\r<BR>\n" );
document.write( "\n" );
document.write( "Source          DF      SS     MS     F      P<BR>\n" );
document.write( "Regression       1   67.40  67.40  4.76  0.066<BR>\n" );
document.write( "Residual Error   7   99.15  14.16<BR>\n" );
document.write( "Total            8  166.55\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Unusual Observations\r<BR>\n" );
document.write( "\n" );
document.write( "Obs  Units  Sales1    Fit  SE Fit  Residual  St Resid<BR>\n" );
document.write( "  1   12.4   17.10  10.55    2.55      6.55      2.37R<BR>\n" );
document.write( "  7   11.2    2.90   9.44    2.12     -6.54     -2.10R\r<BR>\n" );
document.write( "\n" );
document.write( "R denotes an observation with a large standardized residual.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Predicted Values for New Observations\r<BR>\n" );
document.write( "\n" );
document.write( "New<BR>\n" );
document.write( "Obs   Fit  SE Fit     90% CI         90% PI<BR>\n" );
document.write( "  1  6.50    1.31  (4.03, 8.97)  (-1.05, 14.05)\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Values of Predictors for New Observations\r<BR>\n" );
document.write( "\n" );
document.write( "New<BR>\n" );
document.write( "Obs  Units<BR>\n" );
document.write( "  1   8.00\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "If we use values beyond our data set then<BR>\n" );
document.write( "a. the predicted value can be wrong<BR>\n" );
document.write( "b. the linear model may not fit the trend <BR>\n" );
document.write( "c. A & B<BR>\n" );
document.write( "Ans: c<BR>\n" );
document.write( "---------------------------------------------<BR>\n" );
document.write( "9. When we find a variable that is statically significant<BR>\n" );
document.write( "a. it allows us to build a model for estimating points <BR>\n" );
document.write( "b. it can referred to as a “driver” of the change<BR>\n" );
document.write( "c. A & B<BR>\n" );
document.write( "d. it is important based on Bohme’s theory of significance<BR>\n" );
document.write( "Ans: I would say \"a\"<BR>\n" );
document.write( "----------------------------<BR>\n" );
document.write( "10.A point estimate for 8 units is<BR>\n" );
document.write( "a. 8<BR>\n" );
document.write( "b. 6.5<BR>\n" );
document.write( "c. 7.36<BR>\n" );
document.write( "Ans: Sales(8)=-.86 = 0.92*8 = 6.5<BR>\n" );
document.write( "------------------------------------------------<BR>\n" );
document.write( "11. A confidence interval for a sample average of 8 units <BR>\n" );
document.write( "a. 4.72 to 9.56<BR>\n" );
document.write( "b. 4.03 to 8.97<BR>\n" );
document.write( "c. -1.05 to 14.05<BR>\n" );
document.write( "d. 1.15 to 14.05<BR>\n" );
document.write( "Ans: 4.03 to 8.97 is the answer for either question 11 or question 12<BR>\n" );
document.write( "I would have to read some text material to pin it down.<BR>\n" );
document.write( "------------------------------------ <BR>\n" );
document.write( "12. A confidence interval for a individual point of 8 units<BR>\n" );
document.write( "a. 4.72 to 9.56<BR>\n" );
document.write( "b. 4.03 to 8.97<BR>\n" );
document.write( "c. -1.05 to 14.05<BR>\n" );
document.write( "d. 1.15 to 14.05<BR>\n" );
document.write( "Ans: See answer to question 11 <BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );