The figure above shows the main part of our analysis. Vader Sentiment score vs Yelp Ratings. Vader Sentiment is a python library that has predefined scores for the sentiment behind every word. Its not the most perfect library but does the job absolutely fine to score the sentiment behind any sentence. Vader score is given in 4 categories - positive, negative, neutral and compound.
Since we were more interested to find out how negative reviews affect restaurant ratings, we plotted Vader Sentiment negative score vs Yelp Ratings for that restaurant. As we can see in the graph that restaurants in general did not have very high negative vader sentiment score, which means the closed restaurants did not have major reviews expressing negative sentiments from customers.
Majority restaurants had higher yelp ratings and lower vader sentiment negative scores. By this time we had a picture of what the final conclusion might look like.