Investigation 13

Investigation 13 - Moving Length of 12 MAD 6.632 MSD...

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Vanessa Reapor Statistics 252, Section 07 March 10, 2010 Investigation 13: Forecasting Software Sales A) Graph Attached. This plot reveals an increasing seasonality of monthly software sales for this company. B) Forecasted Sales for January 2008: C) Graph Attached. MAPE: 29.3316 MAD: 6.2585 MSD: 82.8516 D) Graph Attached. MAPE: 26.756 E) No, the moving length does not always guarantee to make MAD and MSD smaller than any other length value. Moving Length of 6 MAD: 6.3870 MSD: 87.8806
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Unformatted text preview: Moving Length of 12 MAD: 6.632 MSD: 102.162 F) Graph Attached. MAPE: 28.6073 MAD: 6.0048 MSD: 77.4157 G) Graph Attached. MAPE: 27.3398 H) Moving Average Forecasted Sales for January 2008: 107.25 95% PI: (87.4396, 127.060) Exponential Smoothing Forecasted Sales for January 2008: 104.554 95% PI: (90.0942, 119.014) Forecasts Period Forecast Lower Upper 181 107.25 87.4396 127.060 Forecasts Period Forecast Lower Upper 181 104.554 90.0942 119.014...
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This note was uploaded on 11/21/2011 for the course STAT 252 taught by Professor Staff during the Winter '05 term at Cal Poly.

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Investigation 13 - Moving Length of 12 MAD 6.632 MSD...

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