Two methods for predicting weekly sales for a product gave the following results
|
Period
|
Method 1
|
Method 2
|
|
1
|
80
|
80
|
|
2
|
83
|
82
|
|
3
|
87
|
84
|
|
4
|
90
|
86
|
|
5
|
81
|
86
|
|
6
|
82
|
83
|
|
7
|
82
|
82
|
|
8
|
85
|
82
|
|
The actual demand observed was the following:
|
|
|
Period
|
Actual demand
|
|
1
|
83
|
|
2
|
86
|
|
3
|
85
|
|
4
|
89
|
|
5
|
85
|
|
6
|
84
|
|
7
|
84
|
|
8
|
83
|
Determine the MAPDi and MSEi value of the two methods for i = 1,...,8, as well as the Tracking Signal Si of the two methods. Based on this information, determine whether it is possible to safely use one method or the other.