HP 12c Solutions Handbook page 81

CLEAR
111.4
111.17
An HP-12C program to calculate a centered 12-month moving average
and seasonal variation factor is as follows:
KEYSTROKES
CLEAR
1
2
2
1
3
2
4
3
5
4
6
5
7
0.00
1.00
2.00
4th quarter average seasonal
111.29
variation, %.
00-
01-
02-2
03-
04-
05-
06-
07-
08-
09-
10-
11-
12-
13-
14-
15-
16-
17-
18-
19-
80
DISPLAY
45 1
10
45 2
44 1
40
45 3
44 2
40
45 4
44 3
40
45 5
44 4
40
45 6
44 5
40
45 7