Proof that the mean of predicted values in OLS regression is equal to the mean of original values?
20216
Why do residuals in linear regression always sum to zero when an intercept is included?
54706
Testing symmetry of a distribution around its mean
81851
Testing equality of variances without the data, just from the variances and the mean
98101
why this product is no more than the product of the two mean values?
69828
How do I use the standard regression assumptions to prove that $\hat{\sigma}^2$ is an unbiased estimator of $\sigma^2$?
4064
An equality involving the mean value property
9665
Proof of the independence of the sample mean and sample variance
134109
Why does the degree of freedom of SSR equals 1 in simple linear regression
62513
Proving that the estimate of a mean is a least squares estimator?
128639
Homoskedasticity Assumption: Var(y|x)=Var(u|x)=constant?
59413
Proof of Extended Law of the Mean (Taylor's Formula)
128523
Comparison of two means
120206
How to interpret coefficients of $x$ and $x^2$ in same regression
36807
Derivation of OLS Variance
86134
Distribution of linear combination of OLS regression coefficients
125971
Proof the the Arithmetic-Harmonic Mean is expressible as the Geometric Mean
107234
Is the mean of equal length subsets always equal to the mean of the set?