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Preface to the First Edition










           This book is intended as a reference book for students, professionals and research
           workers  who  need to apply statistical analysis to a large  variety of practical
           problems using STATISTICA, SPSS and MATLAB. The book chapters provide a
           comprehensive coverage  of the main statistical analysis topics (data description,
           statistical  inference, classification and regression, factor  analysis, survival data,
           directional statistics) that one faces in practical problems, discussing their solutions
           with the mentioned software packages.
              The only prerequisite to use the book is an undergraduate knowledge level of
           mathematics. While it is expected that most readers employing the book will have
           already some knowledge of elementary statistics, no previous course in probability
           or statistics is needed in order to study and use the book. The first two chapters
           introduce the basic needed  notions  on probability and statistics. In addition, the
           first two Appendices  provide a short  survey on Probability Theory and
           Distributions for  the reader needing  further clarification  on the theoretical
           foundations of the statistical methods described.
              The book is partly based on tutorial notes and materials used in data analysis
           disciplines taught at the Faculty of Engineering, Porto University. One of these
           disciplines is attended  by students of a Master’s Degree course on information
           management. The students in this course have a variety of educational backgrounds
           and professional interests, which generated and brought about datasets and analysis
           objectives which are quite challenging concerning the methods to be applied and
           the interpretation  of the results. The datasets used in the book examples and
           exercises  were collected from these courses as well as from research. They are
           included in the book CD and cover a broad spectrum of areas: engineering,
           medicine, biology, psychology, economy, geology, and astronomy.
              Every chapter explains the relevant notions and methods concisely, and is
           illustrated with practical examples using  real data,  presented  with the distinct
           intention  of clarifying sensible practical issues. The solutions presented in the
           examples are obtained with one of the software packages STATISTICA, SPSS or
           MATLAB; therefore, the reader has the opportunity to closely follow what is being
           done. The book is not intended as a substitute for the STATISTICA, SPSS and
           MATLAB user manuals.  It  does,  however, provide the  necessary guidance  for
           applying the  methods taught without  having to delve into the manuals. This
           includes, for  each topic explained in  the book, a clear indication of which
           STATISTICA, SPSS or MATLAB tools to be applied. These indications appear in
           specific “Commands” frames together with a complementary description on how to
           use the tools, whenever necessary. In this way, a comparative perspective of the
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