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A consulting firm estimates the following quarterly sales forecasting model: Q₁-a+bt-cD The equation is estimated using quarterly data from 2010/-2020/(t-1... 43). The variable D is a dummy variable for the second quarter where: D=1 In the second quarter, and 0 otherwise. The results of the estimation are: DEPENDENT VARIABLE: OBSERVATIONS: VARIABLE INTERCEPT O T D Multiple Choice O QT R-SQUARE 43 0.8644 No, since 1.86 <2704 No, since 0.55 <1.86 Give the above, at the 1 percent level of significance. Is there a statistically significant trend in sales? No. since 102 <2.704 Yes, since 1.86 0.55 PARAMETER ESTIMATE 22.50 1.86 2.00 Yes, since 3.38> 2.704 F-RATIO 127.5 STANDARD ERROR 9.32 0.55 0.71 P-VALUE ON F 0.0001 T-RATIOP-VALUE 2.41 0.0201 3.38 0.0016 2.82 0.0075

A consulting firm estimates the following quarterly sales forecasting model: Q₁-a+bt-cD The equation is estimated using quarterly data from 2010/-2020/(t-1... 43). The variable D is a dummy variable for the second quarter where: D=1 In the second quarter, and 0 otherwise. The results of the estimation are: DEPENDENT VARIABLE: OBSERVATIONS: VARIABLE INTERCEPT O T D Multiple Choice O QT R-SQUARE 43 0.8644 No, since 1.86 <2704 No, since 0.55 <1.86 Give the above, at the 1 percent level of significance. Is there a statistically significant trend in sales? No. since 102 <2.704 Yes, since 1.86 0.55 PARAMETER ESTIMATE 22.50 1.86 2.00 Yes, since 3.38> 2.704 F-RATIO 127.5 STANDARD ERROR 9.32 0.55 0.71 P-VALUE ON F 0.0001 T-RATIOP-VALUE 2.41 0.0201 3.38 0.0016 2.82 0.0075

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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A consulting firm estimates the following quarterly sales forecasting model: Qt=a+bt+cD The equation is estimated using quarterly data from 2010-2020/// (-1. 43). The variable D is a dummy variable for the second quarter where: D=1 in the second quarter, and 0 otherwise. The results of the estimation are: DEPENDENT VARIABLE: OBSERVATIONS: VARIABLE INTERCEPT T D Multiple Choice O QT R-SQUARE 43 0.8644 O No, since 1.86 < 2.704 No, since 0.55 < 1,86 Give the above, at the 1 percent level of significance. Is there a statistically significant trend in sales? No. since 102 <2704 Yes, since 1.86 0.55 F-RATIO 127.5 Yes, since 3.38 2.704 PARAMETER STANDARD ESTIMATE 22.50 1.86 2.00 ERROR 9.32 0.55 0.71 P-VALUE ON F 0.0001 T-RATIO P-VALUE 2.41 0.0201 3.38 0.0016 2.82 0.0075
Transcribed Image Text:A consulting firm estimates the following quarterly sales forecasting model: Qt=a+bt+cD The equation is estimated using quarterly data from 2010-2020/// (-1. 43). The variable D is a dummy variable for the second quarter where: D=1 in the second quarter, and 0 otherwise. The results of the estimation are: DEPENDENT VARIABLE: OBSERVATIONS: VARIABLE INTERCEPT T D Multiple Choice O QT R-SQUARE 43 0.8644 O No, since 1.86 < 2.704 No, since 0.55 < 1,86 Give the above, at the 1 percent level of significance. Is there a statistically significant trend in sales? No. since 102 <2704 Yes, since 1.86 0.55 F-RATIO 127.5 Yes, since 3.38 2.704 PARAMETER STANDARD ESTIMATE 22.50 1.86 2.00 ERROR 9.32 0.55 0.71 P-VALUE ON F 0.0001 T-RATIO P-VALUE 2.41 0.0201 3.38 0.0016 2.82 0.0075
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