The given table shows the rainfall of Gujarat Region. Forecast the rainfall using Exponential Smoothing. Use Alpha =0.2, 0.5 and 0.8. Data is available from 1997 to 2016, use this series for the calculation and forecast the rainfall for the year 2017. To know, the extent the prediction is correct the actual rainfall for 2017 (1024.4 millimeters) is provided. Find out which alpha values among the three suggestions are near to accurate value?
SUBDIVISION
YEAR
ANNUAL (in MM)
Gujarat Region
1997
1068.9
Gujarat Region
1998
1070
Gujarat Region
1999
568.4
Gujarat Region
2000
550.6
Gujarat Region
2001
849
Gujarat Region
2002
637.2
Gujarat Region
2003
1160.3
Gujarat Region
2004
1005.8
Gujarat Region
2005
1316.4
Gujarat Region
2006
1478
Gujarat Region
2007
1178.9
Gujarat Region
2008
911.1
Gujarat Region
2009
641.6
Gujarat Region
2010
1088.7
Gujarat Region
2011
890.5
Gujarat Region
2012
714
Gujarat Region
2013
1118.6
Gujarat Region
2014
705.7
Gujarat Region
2015
622.9
Gujarat Region
2016
764.9
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