Imagine we have two separate models, Model 1 and Model 2. The R 2 for Model 1 is 0.8 and the R 2 for Model 2 is 0.4.   A. Model 1 is a better model than Model 2   B. Model 2 is a better model than Model 1   C. R2 is neither necessary nor sufficient for analysis to be useful

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A:

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Enhanced ER Model

The enhanced ER model is an abbreviation for Enhanced Entity-Relationship (EER) model. As you know, the entity-relationship (ER) model is a pictorial illustration of the relationship between various entities of a domain. In the case of a large amount of data with multiple interrelated entities, the ER diagrams become complex and tough to interpret. For such cases, the need for enhancement in the ER model was observed, and thus, the EER model was designed.