C. Model Testing
The study is concerned about the effect of factors that
affect the stability of palm oil used Auto Regressive (AR)
Integrated (I) that is Statistic Model accompany with
independent variables. The results are as follow .
1) Augmented Dickey-Fuller Test
The data used in this research are fixed and can be
considered in return to the 11variables. See fig. 5
Fig. 5 shows as the ADF Test Statistic level of all variables
which contain Unit Root or time series is qualified Non
Stationary.