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Gottfried Helms
  • Member for 11 years, 6 months
  • Last seen more than a week ago
13 votes
Accepted

Is PCA unstable under multicollinearity?

10 votes
Accepted

Partial Correlation Interpretation

7 votes

"matrix is not positive definite" - even when highly correlated variables are removed

7 votes
Accepted

How to "regress out" some variables?

6 votes

How to generate a large full-rank random correlation matrix with some strong correlations present?

5 votes

Statistics Jokes

4 votes
Accepted

How to identify variables with significant loadings in PCA?

4 votes

Are standardized betas in multiple linear regression partial correlations?

4 votes
Accepted

Looking for name of statistical property (variance explained by regressor in addition to all other regressors)

3 votes
Accepted

Identifying the coefficients of a principal component

3 votes

Non-orthogonal technique analogous to PCA

3 votes

Is there any good reason to use PCA instead of EFA? Also, can PCA be a substitute for factor analysis?

3 votes

Why log-transforming the data before performing principal component analysis?

2 votes

Is PCA followed by a rotation (such as varimax) still PCA?

2 votes

How to visualize what canonical correlation analysis does (in comparison to what principal component analysis does)?

2 votes
Accepted

When doing PCA, is it possible or correct to find the correlation between variables and the first two components combined?

1 vote
Accepted

How is the proof that the Quartimax/Varimax-rotation converges?

1 vote

Comparing the first principal component with an observed variable (mean)?

1 vote

Factor expressed as standardised variable in factor analysis

1 vote

How to use the Cholesky decomposition, or an alternative, for correlated data simulation

1 vote

Partition of sums of squares (ANOVA)

1 vote

Anova of metric items: SPSS and R display different square-sums and F-values. Which is the better philosophy?

1 vote

Find the rotation between set of points

1 vote

Tool for generating correlated data sets

1 vote
Accepted

Why does varimax applied to PCA outcome fail to do anything at all?

1 vote

What is maximum likelihood PCA?

1 vote

Is there any good reason to use PCA instead of EFA? Also, can PCA be a substitute for factor analysis?

1 vote

Is there any good reason to use PCA instead of EFA? Also, can PCA be a substitute for factor analysis?

1 vote

Is there a statistical justification for removing items from a scale with good reliability?

1 vote

Exploratory factor analysis with fixed factors