Predicting Future Prices: ARIMA Model Forecasts Consumer Price Index Trends
The Consumer Price Index in Ambon City was forecasted using the ARIMA Box-Jenkins method. This method helps find the best pattern in the data for predicting future CPI values. The analysis showed that the most suitable ARIMA model for forecasting CPI in Ambon City from January 2007 to December 2020 is the ARIMA model (1,1,1) with specific values for the parameters.