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1 – Introduction

As far back as time goes, states have always felt the need to have information about their subjects or about the goods they own and produce. It was by developing mathematical tools that the scientists of the time could set up faithful representations of the populations of the States to create the statistics.

2 – Different types of data

There is a whole set of data to study and not all of them study with the same tools. Understanding the different types of data makes it possible to choose the right tool.

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