the general linear model
in this section, we shall study regression problems in which the observations
again satisfy the assumptions of normality , independence, and homoscedasticity that were made in sections
in other words, we shall again assume that each observation
has a normal distributions; that the observation
are independence; and that the observation
have the same variance
in addition, we shall assume that the mean of each observation
a linear combination of p unknown parameter
specifically , for
we shall assume that
has the following form