Why are the Degrees of Freedom for multiple regression n - k - 1? For linear regression, why is it n - 2?
69828
How do I use the standard regression assumptions to prove that $\hat{\sigma}^2$ is an unbiased estimator of $\sigma^2$?
87993
Proof of normal equation in regression using tensor notation
8823
Why the significance of terms in orthogonal polynomial regression changes with the degree of the regression
81301
What is the difference between N and N-1 in calculating population variance?
28074
How are the degrees of freedom in the emmeans package calculated? - R
135975
Why would one suppress the intercept in linear regression?
16159
In counting degrees of freedom of a linear molecule, why is rotation about the axis not counted?
33785
Proof that the coefficients in an OLS model follow a t-distribution with (n-k) degrees of freedom
51985
Ratios in Regression, aka Questions on Kronmal
61051
Covariance term in simple linear regression
122562
Cross product term in linear regression why is it zero
20153
What is the distribution of $R^2$ in linear regression under the null hypothesis? Why is its mode not at zero when $k>3$?
85385
Why do we need multivariate regression (as opposed to a bunch of univariate regressions)?
17773
Why is polynomial regression considered a special case of multiple linear regression?
92862
Degrees of freedom for standard deviation of sample
153314
Multiple Regression, Normal distribution and Normalization
98586
Mathematical Basis behind inflation of Standard errors of Regression estimates due to multicollinearity