a. (5 points) Prove that Y^, the vector of fitted values, is normally distributed with mean X and
variance 2X(XX)1X. b. (5 points) Prove that pred =Yh(new)Y^h is normally distributed with the
mean 0 and variance 2(1+Xh(XX)1Xh)..
a 5 points Prove that Y the vector of fitted values is.pdf
1. a. (5 points) Prove that Y^, the vector of fitted values, is normally distributed with mean X and
variance 2X(XX)1X. b. (5 points) Prove that pred =Yh(new)Y^h is normally distributed with the
mean 0 and variance 2(1+Xh(XX)1Xh).