Data Science Practice
Data Science practice in three layers
Data Collection Layer
The Data collection layer includes data collection, data structuring and data cleaning. A dose of SQL and different data wrangling techniques are important here.
The secret sauce of data science is usually here. This area is huge and involves data modelling, algorithms and calculations, usually with the goal of prediction or inference.
The importance of the presentation layer should not be underestimated. Without clear results and actionable suggestions there is little chance that the data science insights will make any difference.