Exercise 3 and Exercise 4 solution
Regev Schweiger 24 Jan 2016 19:43
Hello all,
I apologize for the lateness. Exercise 3 will be returned to you tomorrow morning.
For Exercise 4, the following is a reference in which you can find the solution to the theoretical questions, in the hope that it would be helpful:
Q1: http://http-server.carleton.ca/~bchu/Document/ECON5005/lecture05.pdf (Note that there are other, more direct solutions).
Q2: https://en.wikipedia.org/wiki/Gauss%E2%80%93Markov_theorem#Proof
Q3: Page 12 of http://www.cs.nyu.edu/~mohri/mlu/mlu_lecture_11.pdf
Regev