2 x 1 10 x 1
As in the two- and three-variable cases, our objective is to estimate the parameters of the multiple regression (C.1.1) and to draw inferences about them from the data at hand. In matrix notation this amounts to estimating ß and drawing inferences about this ß. For the purpose of estimation, we may use the method of ordinary least squares (OLS) or the method of maximum likelihood (ML). But as noted before, these two methods yield identical estimates of the regression coefficients.3 Therefore, we shall confine our attention to the method of OLS.
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