How to Analyze and present predicted and observed data?

The first thing you would want to do is to validate your model with the observed (actual data), herein lies the presentation and analysis of the data. This is done using statistical tools (software). You might want to determine statistical parameters such as chi-square, correlation coefficient, etc. in comparison and validation of your data. If your predicted data highly represents the observed value, then your model is a good fit (well describing the phenomenon).