Step 1 test properties of stillness with Unit Root (Augmented Dickey Fuller, 1979) is a serial data monitoring that looks that are the levels (Stationary) (integrated of Rank), which.
Step 1 Test stillness of data with a Unit Root (Augmented Dickey Fuller, 1979) to check whether a data series that are still (Stationary) at (integrated of Rank) one.
Step 1 qualification test stationarity of the data with Unit Root (Augmented Dickey Fuller 1979), examines the Information Department of the derivative information that is stillness. (Stationary) level (integrated of Rank).