A forecaster used the regression equation Q=a+b+q+c202 + c303 and quarterly sales data for 1998/2016/V(-1,72) for an appliance manufacturer to obtain the results shown below. Qis quarterly sales, and D, D and D3 are dummy variables for quarters I, II and III. DEPENDENT VARIABLE QT R-SQUARE 08798 OBSERVATIONS 72 VARIABLE INTERCEPT T 01 02 PARAMETER ESTIMATE 25 12.0 300 450 F-RATIO 122 547 STANDARD ERROR 12.54 0860 326 10 68 P-VALUE ON F 00001 T-RATIO 287 291 244 P-VALUE 00055 00049 0.0005 00066 00174

ENGR.ECONOMIC ANALYSIS
14th Edition
ISBN:9780190931919
Author:NEWNAN
Publisher:NEWNAN
Chapter1: Making Economics Decisions
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A forecaster used the regression equation
Q₁=a+b+qD₁+202 + c303
and quarterly sales data for 1998/2016/V (t-1.72) for an appliance manufacturer to obtain the results shown below. Q is quarterly sales, and D1, D2.
and D3 are dummy variables for quarters I, II, and III.
DEPENDENT VARIABLE QT
OBSERVATIONS 72
VARIABLE
INTERCEPT
T
01
R-SQUARE
08798
02
03
PARAMETER
ESTIMATE
36
F-RATIO
122 547
STANDARD
ERROR
12.54
0860
326
10 68
18.45
25
12.0
300
450
The estimated QUARTERLY increase in sales is
O
P-VALUE ON F
0.0001
T-RATIO P-VALUE
2.87
00055
291
0.0049
360
0.0005
00066
00174
36
201
2.44
units.
2.5
12
87
Transcribed Image Text:A forecaster used the regression equation Q₁=a+b+qD₁+202 + c303 and quarterly sales data for 1998/2016/V (t-1.72) for an appliance manufacturer to obtain the results shown below. Q is quarterly sales, and D1, D2. and D3 are dummy variables for quarters I, II, and III. DEPENDENT VARIABLE QT OBSERVATIONS 72 VARIABLE INTERCEPT T 01 R-SQUARE 08798 02 03 PARAMETER ESTIMATE 36 F-RATIO 122 547 STANDARD ERROR 12.54 0860 326 10 68 18.45 25 12.0 300 450 The estimated QUARTERLY increase in sales is O P-VALUE ON F 0.0001 T-RATIO P-VALUE 2.87 00055 291 0.0049 360 0.0005 00066 00174 36 201 2.44 units. 2.5 12 87
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