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A Forecaster Used the Regression Equation Qt=a+bt+c1D1+c2D2+c3D3Q _ { t } = a + b t + c _ { 1 } D _ { 1 } + c _ { 2 } D _ { 2 } + c _ { 3 } D _ { 3 }

question 11

Multiple Choice

A forecaster used the regression equation Qt=a+bt+c1D1+c2D2+c3D3Q _ { t } = a + b t + c _ { 1 } D _ { 1 } + c _ { 2 } D _ { 2 } + c _ { 3 } D _ { 3 } and quarterly sales data for 2004I-2021IV (t = 1,...,64) for an appliance manufacturer to obtain the results shown below.Q is quarterly sales,and D1,D2D _ { 1 } , D _ { 2 } and D3D _ { 3 } are dummy variables for quarters I,II,and III.  A forecaster used the regression equation  Q _ { t } = a + b t + c _ { 1 } D _ { 1 } + c _ { 2 } D _ { 2 } + c _ { 3 } D _ { 3 }  and quarterly sales data for 2004I-2021IV (t = 1,...,64) for an appliance manufacturer to obtain the results shown below.Q is quarterly sales,and  D _ { 1 } , D _ { 2 }  and  D _ { 3 }  are dummy variables for quarters I,II,and III.   At the 5 percent level of significance,is there a statistically significant trend in sales? A) Yes,because 0.0362 < 0.05. B) No,because 0.0362 > 0.01. C) Yes,because 0.700 > 0.05. D) Yes,because 2.14 >0.05. E) both c and d At the 5 percent level of significance,is there a statistically significant trend in sales?

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