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  • How to determine AR and MA components for ARIMA model

    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:
    Click image for larger version

Name:	Graph conmibed for the first difference ACF and PACF .png
Views:	1
Size:	52.1 KB
ID:	1773160



    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
    Last edited by Maha Natsheh; 20 Feb 2025, 10:50.
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