Model hyperparameters and model parameters have been used interchangeably in online platforms. It is confusing for many people who are less seasoned in machine learnig area. Eventhough two words replace each other in formal and informal conversations, there is a clear distiction in between based on their role and interaction in machine learning process.
Time series forecasting is a way to predict future behavior of the data we currently have. Time series models provides different ways of handling the prediction based on the patterns of the data. However, there is only one way of knowing how accurate these predictions would be. It is comparing the predicted data with the real data.