Does having negative correlation must also have negative coefficients in linear regression?
105301
Example where a simple correlation coefficient has a sign opposite to that of the corresponding partial correlation coefficient
122562
Cross product term in linear regression why is it zero
20900
Regression without intercept: deriving $\hat{\beta}_1$ in least squares (no matrices)
86364
Does Frisch–Waugh–Lovell theorem change the covariance matrix on regression coefficients?
20216
Why do residuals in linear regression always sum to zero when an intercept is included?
45632
Correlation coefficient contradicts t-test
119032
Is ${\bf x^TAx} \ge { a \bf x^Tx}$ for some $a>0$ not dependent on $\bf x$ if $\bf A$ is positive definite matrix?
127382
What is the expected correlation between residual and the dependent variable?
158205
If $A+A^T$ is negative definite, then the eigenvalues of $A$ have negative real parts?
113792
Why is the quasi-Poisson in GLM not treated as a special case of negative binomial?
20043
Difference between correlation and covariance: is covariance only useful if the relation is linear?
70260
Reason for not shrinking the bias (intercept) term in regression
6402
What does negative R-squared mean?
60601
Why Negative refractive index is negative
55479
Negative R squared contradicts ssa/sst?
94552
Is it possible in R (or in general) to force regression coefficients to be a certain sign?
130070
In linear regression, what does $\beta_1 = 0$ really mean?