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Resumen del libro SPSS 12 Made Simple is the latest edition of one of the most widely read and successful textbooks in its field. This is an extensive revision, partly because SPSS 12 features many significant improvements over earlier releases. Recent years have also seen changes in the information that the researcher is expected to include in scientific papers. In view of the recommendations of the American Psychological Association, the book now contains advice on strength of effect, power, and sample size. There is also guidance on the reporting of the results of statistical tests and other aspects of presentation. The first chapter sets the scene by reviewing and classifying various kinds of research situations and suggesting strategies for statistical analysis. The remainder of the book is structured around the first chapter, which directs the reader to the appropriate procedures in SPSS. Chapters 2 - 5 provide an introduction to the basics of SPSS, describing the entry and editing of data, and moreadvanced techniques, such as sorting, case selection, aggregation, and file merging. In these early chapters, the emphasis is upon checking the accuracy of data entry and exploring your data thoroughly before doing any formal statistics tests. There is extensive coverage of the powerful new graphics capabilities of SPSS 12. The remaining ten chapters cover statistical analytical procedures such as t-tests (and non-parametric alternatives), various kinds of ANOVA, correlation, regression, multiway frequency analysis, discriminant analysis, logistic regression, and factor analysis. The new edition is written with the same clarity that has made the book such a success in the past. There is also the same breadth of coverage. As in previous editions, the material is fully illustrated with screen snapshots of SPSS output, windows, and dialog boxes. In addition, there is a wealth of advice for the experienced researcher, ensuring that the book will continue to prove invaluable to a wide range ofusers. In summary, SPSS Made Simple: Release 12: - Introduces the reader to the use of SPSS 12. - Shows how to get as much out of your data as possible. - Gives balanced advice on choosing a statistical test. - Makes extensive use of screen snapshots of SPSS output, windows with dialog boxes. - Has fully annotated dialog boxes and output. - Includes both chapter-specific and general exercises. - Has a comprehensive index. SPSS 12 is suitable for: Windows 98, Windows Millennium, Windows NT,