Regression: Finding the equation of the line of best fit

Note: for the linear regression model without the intercept, might . not . be equal to 0. Properties of the least square estimate: Two useful results: Let be a random vector, is a matrix and . is a vector. Let. and . Then (a) . (b) Note: The properties of least square estimate: 1. 2. The variance –covariance matrix of the least square ... ................
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