Does the given data show a seasonal effect using moving average method?
|
|
1
|
2
|
3
|
4
|
|
1980
|
938
|
759
|
631
|
871
|
|
1981
|
919
|
720
|
633
|
857
|
|
1982
|
912
|
704
|
630
|
847
|
|
1983
|
903
|
692
|
635
|
839
|
Does the data show a seasonal effect? Assume that it does forecast the figures for 1984.