122
M
'
=
M
t
+ M
t
-¹
+
M
t
-²
+
.... + M
t
-k +¹
?
moving
average
yang kedua
t
M
'
6
k
=
M
4
+ M
5
+ M
6
3
=
29.33 + 30.67 + 28.67
=
29.56
3
a
t
=
M
t
+
(M
t
-
M
'
t
)
=
2M
t
-
M
'
t
a
6
=
2M
6
–
M
‘
6
=
2
*
28.67 – 29.56 = 27.78
b
t
=
2
(M
k
-
1
t
-
M
'
t
)
b
6
=
2
(M
k
-
1
6
-
M
'
6
)
=
2
3
-
1
(28.67 - 29.56) =
-0.89
F
(t +m
)
=
a
t
+
b
t
.m
Pada periode ke-6, m = 1.
F
6
= a
5
+ b
5
.m = 32.11 + 1.44 * 1 = 33.56
 |