Mathematical Modeling of the Price Volatility of Maize and Sorghum between 1960 and 2022

Table 2.

Test for Stationarity

    Maize Sorghum

    t-Statistic t-Statistic
Augmented Dickey-Fuller test statistic -20.51500 -22.46341
Test critical values: 1% level -3.438842 -3.439130
  5% level -2.865178 --2.865305
  10% level -2.568763 --2.568831
    Prob.* 0.0000  0.0000