Difference in sign of correlation coefficient and regression slope
34036
Positive correlation and negative regressor coefficient sign
157430
In multiple regression, a coefficient gets opposite sign in subsample than in the full sample
17790
What is the difference between "coefficient of determination" and "mean squared error"?
106657
What's the difference between correlation and simple linear regression?
69094
Relationship between $R^2$ and correlation coefficient
61051
Covariance term in simple linear regression
51189
The equivalence of sample correlation and R statistic for simple linear regression
52883
Correlation between OLS estimators for intercept and slope
105794
What is the relationship between $\text{Cov}[\mathbf{X},\mathbf{X}]$ and $(\mathbf{X}^T \mathbf{X})^{-1}$ in multiple regression?
48101
Correlation and skewness
122761
Confidence interval around difference of regression coefficients
20043
Difference between correlation and covariance: is covariance only useful if the relation is linear?
105301
Example where a simple correlation coefficient has a sign opposite to that of the corresponding partial correlation coefficient
20835
Residuals correlated positively with response variable strongly in linear regression
149164
Apparent correlation between standardized residuals and predicted in regression
152646
OLS versus IV regression results
22668
Linear vs. nonlinear regression