A seasonal time series data is read and fitted with deterministic and stochastic trend models. A residual approach is followed to fit the stochastic models and a possible set of models is found, and each model is checked for significant coefficients and the significant models are selected for the diagnostics checking. Then the residual analysis is conducted on each model and the model with the stationary residuals is selected for the forecast.

Top 10 Countries based on their GDP

Transforming the data into a tidy format and compare the happiness score in countries around the world nations from 2016 to 2017.