The Principal Components analysis: Application to the Analysis of Secondary Data

Abstract

The purpose of this article is to present the Principal Components Analisys, as a practical example of its aplication, leaving aside the always necessary algebraic and statistical considerations. Indeed, on one hand, we emphasize on the choice processes of the number of component and axis interpretations. On the other hand, the Principal Components Analisys is applied as the first step towards the construction of an stratified sample, particulary using census data.