題組內容
4. The linear model
, where Y is an
vector of observations, X is a
known matrix,
is
a vector of unknown parameters, and
is a vector of errors. Let
, and
.
(c) Prove that H is orthogonal to
(5 %)
4. The linear model
, where Y is an
vector of observations, X is a
known matrix,
is
a vector of unknown parameters, and
is a vector of errors. Let
, and
.
(c) Prove that H is orthogonal to
(5 %)