One of the best techniques of preliminary data analysis is correlation analysis. It allows us to uncover possible relationships between different pairs of variables in our dataset. At the same time, we should always bear in mind that correlation does not mean causation. Correlation studies the relationship between two variables. It is very easy to apply and requires us to type a single formula with tools like Python, Excel, R, etc.
Some other related topics you might be interested to explore are Trend Analysis, Comparative Analysis, Value-Based Analysis, and Time Series Analysis.
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