ALEA: a contribution to promote the statistical literacy. Data analysis and teaching of statitsics in the secondary schools

This text describes some trends concerning the support in the teaching of Statistics in Mathematics subject and introduces ALEA project as a tool to improve statistical literacy. First, some ...

Analysis of missing categorical data

This is an article dealing with the analysis of categorical data when some sample units are not fully classified. It is intended to review and develop the application of the maximum likelihood ...

Convex functions of set: an apllication to the least squares method

In this paper we develop the concept of convex classes of sets and of convex functions of set. These concepts are useful for studying some set functions as for instance the supremum function when the ...

Overview of portugueses census - : concerning development strategy, enumeration structure, basic geography units and use of administrative registers as a support control

Population and Housing Censuses for 2001 (2001 Censuses) are being prepared following a development strategy that includes the analysis and approval of Global Programme and Dissemination Programme by ...