This module aims at providing students with the main techniques of descriptive statistics, probability theory and statistical inference. In general, these techniques offer a solid ground to perform quantitative analysis of those collective phenomena that are of main interest in business and social sciences. More specifically, methodologies presented in this module are required to describe, interpret and manipulate official data, as well as to carry out an independent statistical analysis in socio-economic contexts. Also, they form the basis of decision analysis in business realities that are becoming increasingly more international. Also, this module aims at offering students the instruments to critically evaluate the proposed techiques.