FAQ/mvFAQ - CBU statistics Wiki

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Questions about multivariate analyses

  1. [:FAQ/heterogeneity: What is heterogeneity of variance in SPSS Probit and Logit procedures?]
  2. [:FAQ/SobelTest:How do I test whether one independent variable has an influence on a dependent variable other than via the mediation of a second independent variable? (Sobel Test)]

  3. [:FAQ/Collinearity:What is collinearity in multiple regression, and what do I do about it?]

  4. [:FAQ/condnoR: How do I find the condition number of a matrix using R?]
  5. [:FAQ/RatCaseVar:Is there an optimal ratio of cases to predictor variables I should have before performing a multivariate analysis?]

  6. [:FAQ/patternMatrix: Which matrix of loadings do I use doing a principal components extraction or non-PC analysis with a direct oblimin rotation when doing a factor analysis?]
  7. [:FAQ/thresholds: What thresholds should I use for factor loading cut-offs?]
  8. [:FAQ/congruenceC: How do I compare a pair of factor loadings?]
  9. [:FAQ/compare: What is the difference between principal components analysis, principal axis analysis and other factor extraction methods?]
  10. [:FAQ/NoFactors: How many factors should I retain in a factor analysis?]
  11. [:FAQ/Cronbach: A note on Cronbach's Alpha.]
  12. [:FAQ/PlusFac: How do I interpret variables which load on more than one factor?]
  13. [:FAQ/mds: What is multidimensional scaling and how do I do it?]
  14. [:FAQ/cancorr: What is canonical correlation and where can I use it?]
  15. [:FAQ/MANOVA:When should I use a Multivariate Analysis of Variance (MANOVA)?]

  16. [:FAQ/infmles:Why are the standard errors so large in logistic regression?]
  17. [:FAQ/logrrsq:How do I choose between different logistic regression models?]
  18. [:FAQ/threshold:Which discriminant analysis should I use to obtain thresholds to indicate levels of abnormality using a single variable?]
  19. [:FAQ/structure:How do I assess the importance of variables in a Normal Discriminant analysis?]
  20. [:FAQ/criteria:Can you recommend any two group discriminant diagnostics?]
  21. [:FAQ/NDcasestat:Which output criteria should I use when using the casewise results option with the Normal discriminant method in SPSS?]

  22. [:FAQ/roc:How do I plot and interpret a ROC curve in assessing strength in two group prediction?]
  23. [:FAQ/missing:How do I handle missing data in multivariate analyses in SPSS?]
  24. [:FAQ/cc:How do I find complete cases in SPSS and R?]
  25. [:FAQ/lag:How can I detect identical cases in SPSS without having an ID number?]
  26. [:FAQ/euclid:What is Euclidean distance and how do I compute it?]
  27. [:FAQ/mahal:How do I detect multivariate outliers?]
  28. [:FAQ/sem:Structural equation modelling in R]
  29. [:FAQ/texts: Can you recommend any statistical textbooks?]
  30. [:FAQ/mvnormc: How do I check for multivariate normality?]