Aim of project was to study how variables are correlated by use corr()Dataframe method to come up with correlogram.

Correlation is used to test relationships between quantitative variables or categorical variables. In other words, it's a measure of how things are related. 

Correlation coefficients quantify the association between variables or features of a dataset. These statistics are of high importance for science and technology, and Python has great tools that you can use to calculate them. SciPy, NumPy, and Pandas correlation methods are fast, comprehensive, and well-documented.