Hello,
Hope this finds you well,
I have monthly data for 60 months (time series data set), I want to compute AR and MA components for ARIMA model, the ACF and PACF plots for residuals are as below:

The lags 16th, 17th, 20the and 27th are significant, how could I refer this to my ARIMA model without overfitting?
By knowing that my dependent variable (readmission rate) is at its first difference, D=1
Many thanks in advance!
Maha Natsheh
Hope this finds you well,
I have monthly data for 60 months (time series data set), I want to compute AR and MA components for ARIMA model, the ACF and PACF plots for residuals are as below:
The lags 16th, 17th, 20the and 27th are significant, how could I refer this to my ARIMA model without overfitting?
By knowing that my dependent variable (readmission rate) is at its first difference, D=1
Many thanks in advance!
Maha Natsheh