problem 08-23 Algo (Using Regression Analysis for Forecasting Quarter:1,2,3,4 ye
ID: 3074546 • Letter: P
Question
problem 08-23 Algo (Using Regression Analysis for Forecasting
Quarter:1,2,3,4
year 1: 2,0,5,5
year 2: 5,2,8,8
year 3: 7,6,10,10
Can you please show me how to step up excel spreadsheet for this problem. How to figure out the problems on this question.
Use a multiple regression model with dummy variables as follows to develop an equation to account for seasonal effects in the data. Qtr1 = 1 if Quarter 1, 0 otherwise; Qtr2 = 1 if Quarter 2, 0 otherwise; Qtr3 = 1 if Quarter 3, 0 otherwise. If required, round your answers to three decimal places. For subtractive or negative numbers use a minus sign even if there is a + sign before the blank. (Example: -300) If the constant is "1" it must be entered in the box. Do not round intermediate calculation. = + Qtr1 + Qtr2 + Qtr3 (c) Compute the quarterly forecasts for next year based on the model you developed in part (b). If required, round your answers to three decimal places. Do not round intermediate calculation. Year Quarter Ft 4 1 4 2 4 3 4 4 (d) Use a multiple regression model to develop an equation to account for trend and seasonal effects in the data. Use the dummy variables you developed in part (b) to capture seasonal effects and create a variable t such that t = 1 for Quarter 1 in Year 1, t = 2 for Quarter 2 in Year 1,… t = 12 for Quarter 4 in Year 3. If required, round your answers to three decimal places. For subtractive or negative numbers use a minus sign even if there is a + sign before the blank. (Example: -300) = + Qtr1 + Qtr2 + Qtr3 + t (e) Compute the quarterly forecasts for next year based on the model you developed in part (d). Do not round your interim computations and round your final answer to three decimal places. Year Quarter Period Ft 4 1 13 4 2 14 4 3 15 4 4 16 (f) Is the model you developed in part (b) or the model you developed in part (d) more effective? If required, round your intermediate calculations and final answer to three decimal places. Model developed in part (b) Model developed in part (d) MSEExplanation / Answer
c)
regression of y on q1,q2 ,q3 yields above result
y^ = 7.66666 -3Q1 -5Q2
d)
e)
Actual Demand y t Q1 Q2 Q3 quarter 2 1 1 0 0 4.66666667 0 2 0 1 0 2.66666667 5 3 0 0 1 7.66666667 5 4 0 0 0 7.66666667 5 5 1 0 0 4.66666667 2 6 0 1 0 2.66666667 8 7 0 0 1 7.66666667 8 8 0 0 0 7.66666667 7 9 1 0 0 4.66666667 6 10 0 1 0 2.66666667 10 11 0 0 1 7.66666667 10 12 0 0 0 7.66666667 13 1 0 0 4.66666667 14 0 1 0 2.66666667 15 0 0 1 7.66666667 16 0 0 0 7.66666667Related Questions
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