Regression Through the Origin. The intercept is absent or zero. It can be shown that:. Regression Through the Origin. Characteristics of this model:In calculating the parameter we use raw and cross products instead of mean-adjusted sums of squares and cross productsThe degrees of freedom are n-1 rather than n-2The formula for r2 includes an intercept. Therefore you should not use this formula, or you will obtain nonsensical results, like negative r2The sum of the residuals is always zero,9462
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