FAQ/regFAQ - CBU statistics Wiki

Revision 44 as of 2009-04-24 11:44:36

Clear message
location: FAQ / regFAQ
  1. [:FAQ/E:What does a number containing an 'E' signify?]
  2. [:FAQ/heterogeneity: What is heterogeneity of variance in SPSS Probit and Logit procedures?]
  3. [:FAQ/probitv6: Why don't I see fiducial confidence intervals doing a probit analysis in version 16 of SPSS?]

  4. [:FAQ/SumsOfSquaresTypes:In ANOVA and Regression, what do the various different types of Sums of Squares mean, and does the choice matter?]

  5. [:FAQ/FVars: What is the variance of the mean of my transformed data?]

  6. [:FAQ/Interaction:How do I work out the meaning of a significant interaction?]

  7. [:FAQ/contint:How do I test for an interaction involving a continuous variable?]
  8. [:FAQ/stepints:How do I perform a stepwise regression in SPSS involving interactions?]
  9. [:FAQ/intercept: Interpreting the intercept term in a regression when covarying out predictors of within-subject difference scores]
  10. [:FAQ/constregSPSS: How do I obtain covariance terms involving the intercept term in a linear regression using SPSS?]
  11. [:FAQ/beta: How do I compute linear trend coefficients for single cases?]
  12. [:FAQ/dummy: How do I construct dummy variables for use in SPSS linear regression?]
  13. [:FAQ/singcase: How do I compare a within subjects group difference to that of a single case?]
  14. [:FAQ/ancreg:Can I do an analysis of covariance using a regression?]

  15. [: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)]

  16. [:FAQ/regline:How do I put a regression line on a scatterplot in SPSS Version 12.0 and above?]
  17. [:FAQ/intcptr2:Why does the R-squared change when I fix the intercept in my regression line from its least squares value?]

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

  19. [:FAQ/condnoR: How do I find the condition number of a matrix using R?]
  20. [:FAQ/facnum: How do I convert a factor variable into a numeric in R?]
  21. [:FAQ/nom: How do I perform a regression with a categorical outcome?]
  22. [:FAQ/iso: How do I look for the best fitting model with an unknown changepoints on ordered data?]
  23. [:FAQ/dummyCor:Regression diagnostics for categorical variables]
  24. [:FAQ/wald:What is the Wald statistic?]
  25. [:FAQ/x1se:How do I compute the standard error of X1 in a regression also featuring X2?]

  26. [:FAQ/betase:How do I compute the standard error of beta in a linear regression in SPSS?]

  27. [:FAQ/ResidualsNonNormality:Residuals and (Non-)Normality]

  28. [:FAQ/AdequateFit:How well does a regression line fit?]

  29. [:FAQ/RegressionOutliers:Checking for outliers in regression]

  30. [:FAQ/infmles:Why are the standard errors so large in logistic regression?]
  31. [:FAQ/texts: Can you recommend any statistical textbooks?]

  32. [:FAQ/RatCaseVar:Is there an optimal ratio of cases to predictor variables I should have before doing a regression?]

  33. [:FAQ/subsets: How do I perform all possible subsets regression in SPSS?]
  34. [:FAQ/power:How do I do power calculations in SPSS?]

  35. [:FAQ/RegCor:What is the relationship between significance tests of regression coefficients and of correlation coefficients?]

  36. [:FAQ/rsqdiff:How do I compare two squared (semi-partial) correlation coefficients (R-squareds) from different samples?]
  37. [:FAQ/cohenrsq:How do I compare two squared (semi-partial) correlation coefficients from the same sample?]
  38. [:FAQ/rsqadj:How do I adjust R-squareds for the number of predictors in a model?]
  39. [:FAQ/multilevel: What are multilevel models and when do I use them?]
  40. [:FAQ/mixedR: Where can I find our about using random effects (multilevel) models in R including obtaining proportion of variance explained by a variable?]
  41. [:FAQ/ssq: What does 's' denote when used to describe a General Linear Model (GLM)?]