Questions about correlations

1. [:FAQ/skew:How should I deal with outliers when doing correlations?]
2. [:FAQ/rt1d:How do I correlate change with baseline?]
3. [:FAQ/partsp:How do I produce nonparametric Spearman partial correlations using SPSS?]

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

5. [:FAQ/WilliamsSPSS:How do I compare a pair of correlations?]

6. [:FAQ/avcor:How do I obtain an average correlation?]
7. [:FAQ/corrs:How do I test if a correlation is zero?]
8. [:FAQ/corrdf:How many degrees of freedom are associated with a test of whether a zero-order or multiple correlation equals zero?]
9. [:FAQ/pvs:How do I adjust p-values to test if more than one correlation is zero?]
10. [:FAQ/corrsCi:How do I obtain a 95% confidence interval for a correlation (or slope in a simple regression) in SPSS?]
11. [:FAQ/Power: Power calculations for testing if correlations equal zero]
12. [:FAQ/polychoric: What are polychoric correlations and how do I compute them and use in SPSS?]
13. [:FAQ/icc: What are intraclass correlations and how do I use them?]
14. [:FAQ/rest: A note on correcting for restriction of ranges which underestimate Pearson correlations]

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