I am working on a time series and trying to fit ARIMA to predict future values.However,
I am facing trouble with finding out whether the data is stationary or not.
I believe you know how to check whether the data is stationary or not by looking at the ACF & PACF plots.
To do this in Minitab, we use Stat – Time Series – Autocorrelation and Stat – Time Series – Partial Autocorrelation.
With no data given here I would suggest you to refer this document. Hope this helps !