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← Revision 86 as of 2017-07-18 14:22:57 ⇥
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1. [:FAQ/E:What does a number containing an 'E' signify?] | == Questions about linear regression == |
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1. [:FAQ/pearson:What is the relationship between the Pearson correlation and a simple regression estimate?] | 1. [[FAQ/E|What does a number containing an 'E' signify?]] |
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1. [:FAQ/suppress:What is the relationship between predictor variable correlations and the presence of a suppressor variable?] | 1. [[FAQ/pearson|What is the relationship between the Pearson correlation and a simple regression estimate?]] |
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1. [:FAQ/studentres:How do I check for outliers in a simple regression with one predictor variable?] | 1. [[FAQ/suppress|What is the relationship between predictor variable correlations and the presence of a suppressor variable?]] |
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1. [:FAQ/heterogeneity: What is heterogeneity of variance in SPSS Probit and Logit procedures?] | 1. [[FAQ/studentres|How do I check for outliers in a simple regression with one predictor variable?]] |
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1. [:FAQ/probitv6: Why don't I see fiducial confidence intervals doing a probit analysis in version 16 of SPSS?] | 1. [[FAQ/heterogeneity| What is heterogeneity of variance in SPSS Probit and Logit procedures?]] |
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1. [:FAQ/meta: Meta-analysis issues: 1) How do I measure publication bias? 2) How do I obtain a confidence interval for pooled estimates from sets of log odds, Cohen's d and Pearson correlations using meta-analysis?] | 1. [[FAQ/probitv6| Why don't I see fiducial confidence intervals doing a probit analysis in version 16 of SPSS?]] |
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1. [:FAQ/SumsOfSquaresTypes:In ANOVA and Regression, what do the various different types of Sums of Squares mean, and does the choice matter?] | 1. [[FAQ/meta| Meta-analysis issues: 1) How do I measure publication bias? 2) How do I obtain a confidence interval for pooled estimates from sets of log odds, Cohen's d and Pearson correlations using a) meta-analysis and b) for Cohen's d as suggested for combining two studies to assess replication of a result?]] 1. [[FAQ/SumsOfSquaresTypes|In ANOVA and Regression, what do the various different types of Sums of Squares mean, and does the choice matter?]] |
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1. [:FAQ/FVars: What is the variance of the mean of my transformed data?] | 1. [[FAQ/FVars| What is the variance of the mean of my transformed data?]] |
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1. [:FAQ/Interaction:How do I work out the meaning of a significant interaction?] | 1. [[FAQ/Interaction|How do I work out the meaning of a significant interaction?]] |
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1. [:FAQ/contint:How do I test for an interaction involving a continuous variable (moderation analysis)?] | 1. [[FAQ/contint|How do I test for an interaction involving a continuous variable (moderation analysis)?]] |
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1. [:FAQ/hier:What is the difference between a hierarchical and a stepwise regression?] | 1. [[FAQ/hier|What is the difference between a hierarchical and a stepwise regression? Also:a reference for an alternative, decision trees]] |
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1. [:FAQ/stepints:How do I perform a stepwise regression in SPSS involving interactions?] | 1. [[FAQ/stepints|How do I perform a stepwise regression in SPSS involving interactions?]] |
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1. [:FAQ/intercept: Interpreting the intercept term in a regression when covarying out predictors of within-subject difference scores] | 1. [[FAQ/intercept| Interpreting the intercept term in a regression when covarying out predictors of within-subject difference scores]] |
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1. [:FAQ/intuni: What is the importance of including an intercept term in the SPSS (between subjects ANOVA) univariate procedure?] | 1. [[FAQ/intuni| What is the importance of including an intercept term in the SPSS (between subjects ANOVA) univariate procedure?]] |
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1. [:FAQ/~constregSPSS: How do I obtain covariance terms involving the intercept term in a linear regression using SPSS?] | 1. [[FAQ/constregSPSS| How do I obtain covariance terms involving the intercept term in a linear regression using SPSS?]] |
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1. [:FAQ/beta: How do I compute linear trend coefficients for single cases?] | 1. [[FAQ/singcaserefs| Are there any primer publications explaining rationale and application of single case studies?]] |
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1. [:FAQ/dummy: How do I construct dummy variables for use in SPSS linear regression?] | 1. [[FAQ/beta| How do I compute linear trend coefficients for single cases?]] |
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1. [:FAQ/singcase: How do I compare a within subjects group difference to that of a single case?] | 1. [[FAQ/dummy| How do I construct dummy variables for use in SPSS linear regression?]] |
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1. [:FAQ/ancreg:Can I do an analysis of covariance using a regression?] | 1. [[FAQ/singcase| How do I compare a within subjects group difference to that of a single case?]] |
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1. [: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)] | 1. [[FAQ/ancreg|Can I do an analysis of covariance using a regression?]] |
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1. [:FAQ/causation:Can I fit two-way links between variables in a path model?] | 1. [[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)]] |
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1. [:FAQ/regline:How do I put a regression line on a scatterplot in SPSS Version 12.0 and above?] | 1. [[FAQ/causation|Can I fit two-way links between variables in a path model?]] |
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1. [:FAQ/intcptr2:Why does the R-squared change when I fix the intercept in my regression line from its least squares value?] | 1. [[FAQ/regline|How do I put a regression line on a scatterplot in SPSS Version 12.0 and above?]] 1. [[FAQ/intcptr2|Why does the R-squared change when I fix the intercept in my regression line from its least squares value?]] |
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1. [:FAQ/Collinearity:What is Collinearity in multiple regression, and what do I do about it?] | 1. [[FAQ/Collinearity|What is Collinearity in multiple regression, and what do I do about it?]] |
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1. [:FAQ/condnoR: How do I find the condition number of a matrix using R?] | 1. [[FAQ/condnoR| How do I find the condition number of a matrix using R?]] |
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1. [:FAQ/facnum: How do I convert a factor variable into a numeric in R?] | 1. [[FAQ/facnum| How do I convert a factor variable into a numeric in R?]] |
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1. [:FAQ/nom: How do I perform a regression with a categorical outcome?] | 1. [[FAQ/nom| How do I perform a regression with a categorical outcome?]] |
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1. [:FAQ/iso: How do I look for the best fitting model with an unknown changepoints on ordered data?] | 1. [[FAQ/iso| How do I look for the best fitting model with an unknown changepoints on ordered data?]] |
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1. [:FAQ/dummyCor:Regression diagnostics for categorical variables] | 1. [[FAQ/dummyCor|Regression diagnostics for categorical variables]] |
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1. [:FAQ/wald:What is the Wald statistic?] | 1. [[FAQ/wald|What is the Wald statistic?]] |
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1. [:FAQ/x1se:How do I compute the standard error of X1 in a regression also featuring X2?] | 1. [[FAQ/x1se|How do I compute the standard error of X1 in a regression also featuring X2?]] |
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1. [:FAQ/ab-a:How do I interpret a regression involving variables A and B-A in predicting an outcome?] | 1. [[FAQ/ab-a|How do I interpret a regression involving variables A and B-A in predicting an outcome?]] |
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1. [:FAQ/covary:How do I test to see if a mean adjusted for a covariate equal zero within a single group?] | 1. [[FAQ/covary|How do I test to see if a mean adjusted for a covariate equal zero within a single group?]] |
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1. [:FAQ/betase:How do I compute the standard error of ''beta'' in a linear regression in SPSS?] | 1. [[FAQ/betase|How do I compute the standard error of ''beta'' in a linear regression in SPSS?]] |
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1. [:FAQ/ResidualsNonNormality:Residuals and (Non-)Normality] | 1. [[FAQ/ResidualsNonNormality|Residuals and (Non-)Normality]] 1. [[FAQ/AICreg|How do I compute Akaike's and Bayesian information criteria (AIC, BIC) to compare regression models and how do I interpret them?]] |
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1. [:FAQ/AdequateFit:How well does a regression line fit?] | 1. [[FAQ/AdequateFit|How well does a regression line fit?]] |
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1. [:FAQ/RegressionOutliers:Checking for outliers in regression] | 1. [[FAQ/RegressionOutliers|Checking for outliers in regression]] |
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1. [:FAQ/infmles:Why are the standard errors so large in logistic regression?] | 1. [[FAQ/infmles|Why are the standard errors so large in logistic regression?]] |
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1. [:FAQ/texts: Can you recommend any statistical textbooks?] | 1. [[FAQ/texts| Can you recommend any statistical textbooks?]] |
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1. [:FAQ/RatCaseVar:Is there an optimal ratio of cases to predictor variables I should have before doing a regression?] | 1. [[FAQ/RatCaseVar|Is there an optimal ratio of cases to predictor variables I should have before doing a regression?]] |
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1. [:FAQ/subsets: How do I perform all possible subsets regression in SPSS?] | 1. [[FAQ/subsets| How do I perform all possible subsets regression in SPSS?]] |
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1. [:FAQ/power:How do I do power calculations in SPSS?] | 1. [[FAQ/powprogs|How do I do power calculations in SPSS?]] |
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1. [:FAQ/RegCor:What is the relationship between significance tests of regression coefficients and of correlation coefficients?] | 1. [[FAQ/RegCor|What is the relationship between significance tests of regression coefficients and of correlation coefficients?]] |
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1. [:FAQ/rsqdiff:How do I compare two squared (semi-partial) correlation coefficients (R-squareds) from different samples?] | 1. [[FAQ/semiprinR|How do I compute the semi-partial correlation coefficient in R?]] |
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1. [:FAQ/cohenrsq:How do I compare two squared (semi-partial) correlation coefficients from the same sample?] | 1. [[FAQ/rsqdiff|How do I compare two squared (semi-partial) correlation coefficients (R-squareds) from different samples?]] |
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1. [:FAQ/rsqadj:How do I adjust R-squareds for the number of predictors in a model?] | 1. [[FAQ/cohenrsq|How do I compare two squared (semi-partial) correlation coefficients from the same sample?]] |
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1. [:FAQ/multilevel: What are random effect and multilevel models and when do I use them?] | 1. [[FAQ/rsqadj|How do I adjust R-squareds for the number of predictors in a model?]] |
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1. [:FAQ/mixedR: Where can I find our about using random effects (including multilevel) models in R (including obtaining proportion of variance explained by a variable) & in SPSS?] | 1. [[FAQ/multilevel| What are random effect and multilevel models, when do I use them and are there effect sizes?]] |
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1. [:FAQ/ssq: What does 's' denote when used to describe a General Linear Model (GLM)?] | 1. [[FAQ/mixedR| Where can I find our about using random effects (including multilevel) models in R (including obtaining proportion of variance explained by a variable) & in SPSS?]] 1. [[FAQ/hess| What does an error message concerning the Hessian matrix suggest when running a mixed (random effects) model?]] 1. [[FAQ/ssq| What does 's' denote when used to describe a General Linear Model (GLM)?]] 1. [[FAQ/gam| What is a Generalized Additive (Mixed) Model (GA(M)M) and when do I use it?]] |
Questions about linear regression
What is the relationship between the Pearson correlation and a simple regression estimate?
How do I check for outliers in a simple regression with one predictor variable?
What is heterogeneity of variance in SPSS Probit and Logit procedures?
Why don't I see fiducial confidence intervals doing a probit analysis in version 16 of SPSS?
How do I test for an interaction involving a continuous variable (moderation analysis)?
How do I perform a stepwise regression in SPSS involving interactions?
How do I obtain covariance terms involving the intercept term in a linear regression using SPSS?
Are there any primer publications explaining rationale and application of single case studies?
How do I compute linear trend coefficients for single cases?
How do I construct dummy variables for use in SPSS linear regression?
How do I compare a within subjects group difference to that of a single case?
How do I put a regression line on a scatterplot in SPSS Version 12.0 and above?
What is Collinearity in multiple regression, and what do I do about it?
How do I look for the best fitting model with an unknown changepoints on ordered data?
How do I compute the standard error of X1 in a regression also featuring X2?
How do I interpret a regression involving variables A and B-A in predicting an outcome?
How do I test to see if a mean adjusted for a covariate equal zero within a single group?
How do I compute the standard error of ''beta'' in a linear regression in SPSS?
Why are the standard errors so large in logistic regression?
Is there an optimal ratio of cases to predictor variables I should have before doing a regression?
How do I compute the semi-partial correlation coefficient in R?
How do I compare two squared (semi-partial) correlation coefficients from the same sample?
How do I adjust R-squareds for the number of predictors in a model?
What are random effect and multilevel models, when do I use them and are there effect sizes?
What does 's' denote when used to describe a General Linear Model (GLM)?
What is a Generalized Additive (Mixed) Model (GA(M)M) and when do I use it?