Pitfalls of Data Analysis
Posted by Armando Brito Mendes | Filed under estatística
Como evitar erros e viéses na análise de dados
There seems to be a pervasive notion that “you can prove anything with statistics.” This is only true if you use them improperly. In this workshop we’ll discuss things that people often overlook in their data analysis, and ways people sometimes “bend the rules” of statistics to support their viewpoint. We will also discuss ways you can make sure your own statistics are clear and accurate. I will include examples from medicine, education, and industry.
Tags: análise de dados, Estat Descritiva, inferência
Statistics on Likert Scale Surveys
Posted by Armando Brito Mendes | Filed under estatística, materiais para profissionais, software
Discute as análises de dados legítimas em escalas ordinais
Reading in the survey from optical mark scanning sheet data
Producing a Table of the frequency results
Producing Means and Standard Deviations
Using T-Tests to compare groups
About the assumptions of the T-Test
An Alternative to T-Tests: the Chi Square Statistic
Computing Subscales and what to do about reverse wording
Tags: análise de dados, IBM SPSS Statistics, inferência, inquéritos, software estatístico
Survey Design Tips
Posted by Armando Brito Mendes | Filed under estatística, materiais para profissionais
Conselho no desenho de questões de um questionário
Survey Design Tips
Writing great questions is an art that like all arts requires a great amount of work, practice, and help from others. The following discussion is one that identifies some of the common pitfalls in survey design and helps in creating a great survey.
Avoid loaded or leading words or questions
Misplaced questions
Mutually non-exclusive response categories
Nonspecific questions
Confusing or unfamiliar words
Non-directed questions give respondents excessive latitude
Forcing answers
Non-exhaustive listings
Unbalanced listings
Double barreled questions
Dichotomous questions
Long questions
Questions on future intentions
Tags: captura de conhecimento, inquéritos
Survey Design
Posted by Armando Brito Mendes | Filed under estatística, materiais para profissionais
Bons conselhos para realização de inquéritos
The Steps in a Survey Project
- Establish the goals of the project – What you want to learn
- Determine your sample – Whom you will interview
- Choose interviewing methodology – How you will interview
- Create your questionnaire – What you will ask
- Pre-test the questionnaire, if practical – Test the questions
- Conduct interviews and enter data – Ask the questions
- Analyze the data – Produce the reports
Tags: captura de conhecimento, inquéritos
SPSS Course Content
Posted by Armando Brito Mendes | Filed under estatística, materiais ensino, software
Elementos de um curso de SPSS básico de 2000
Descriptive Statistics
Statistical Notes
Data Transformations
File Transformations
Crosstabulation and Measures of Association
Differences Between Two Groups
ANOVA: Between Subjects
—————————–General Linear Model (GLM)—————————
ANOVA: Repeated Measures
———General Linear Model (GLM)———
Tags: análise de dados, IBM SPSS Statistics, inferência, inquéritos, software estatístico
SPSS Topics Multilevel Modeling
Posted by Armando Brito Mendes | Filed under estatística, materiais ensino, software
Vários materiais sobre Modelação Multinível
SPSS Topics
Multilevel Modeling
These pages contain links from all parts of our web site and others web sites on multilevel modeling. The topics will vary from introductory to advanced.
SPSS Frequently Asked Questions
SPSS Textbook Examples
SPSS Paper Examples
SPSS Library
Code Fragments
Tags: análise de dados, IBM SPSS Statistics, inferência, software estatístico
SPSS Topics Logistic Regression
Posted by Armando Brito Mendes | Filed under estatística, materiais ensino, software
Vários materiais sobre Regressão Logística
SPSS Topics
Logistic Regression
These pages contain links from all parts of our web site and others web sites on logistic and related types of regression. The topics will vary from introductory to advanced.
Data Analysis Examples
Annotated Output
SPSS Frequently Asked Questions
Textbook Examples
SPSS Library
SPSS Code Fragments
Tags: análise de dados, captura de conhecimento, data mining, IBM SPSS Statistics, inferência, inquéritos, software estatístico
SPSS Topics Regression
Posted by Armando Brito Mendes | Filed under estatística, materiais ensino, software
Vários materiais, incluindo vídeos, sobre Regressão Linear
These pages contain links from all parts of our web site and others web sites on regression analysis. The topics will vary from introductory to advanced.
SPSS Annotated output
SPSS Seminars
SPSS Web Books
SPSS Frequently Asked Questions
Textbook Examples
SPSS Library
Tags: análise de dados, data mining, IBM SPSS Statistics, software estatístico
Analysis of Variance
Posted by Armando Brito Mendes | Filed under estatística, materiais ensino, software, videos
Vários materiais, incluindo vídeos, sobre ANOVA e Regressão
SPSS Topics
Analysis of Variance
These pages contain links from all parts of our web site and others web sites on analysis of variance. The topics will vary from introductory to advanced.
SPSS Data Analysis Examples
SPSS Seminars
SPSS Web Books
SPSS Frequently Asked Questions
Textbook Examples
SPSS Library
SPSS Code Fragments
Tags: análise de dados, IBM SPSS Statistics, inferência, inquéritos, software estatístico
What statistical analysis should I use?
Posted by Armando Brito Mendes | Filed under estatística, software
Excelente tabela de decisão sobre os métodos estatísticos com exemplos
The following table shows general guidelines for choosing a statistical analysis. We emphasize that these are general guidelines and should not be construed as hard and fast rules. Usually your data could be analyzed in multiple ways, each of which could yield legitimate answers. The table below covers a number of common analyses and helps you choose among them based on the number of dependent variables (sometimes referred to as outcome variables), the nature of your independent variables (sometimes referred to as predictors). You also want to consider the nature of your dependent variable, namely whether it is an interval variable, ordinal or categorical variable, and whether it is normally distributed (see What is the difference between categorical, ordinal and interval variables? for more information on this). The table then shows one or more statistical tests commonly used given these types of variables (but not necessarily the only type of test that could be used) and links showing how to do such tests using SAS, Stata and SPSS.
Tags: análise de dados, captura de conhecimento, data mining, IBM SPSS Statistics, inferência, inquéritos, software estatístico
