typos I could find

[pachadotdev]

https://github.com/bcaffo/lm/blob/master/01_background.tex To check that $\tilde \by$ is centered, consider multiplying by $\bone_n$ (which sums its elements)... missing "y"

https://github.com/bcaffo/lm/blob/master/02_single_parameter.tex "are the empirical correlation and" should say "covariance"

https://github.com/bcaffo/lm/blob/master/02_single_parameter.tex and similarly $\ip{\tilde \bx}{\tilde \bx} = (n-1)\hat{\sigma}_y^2$ typo for x'x