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• 12:58, 20 August 2026 WikiSysopIG talk contribs created page Ordinary least squares (Created page with "'''Ordinary least squares''' ('''OLS''') is a method for estimating the parameters of a linear regression model by minimizing the sum of the squared differences between observed and fitted values. For a simple linear regression model: <math> Y_i = \beta_0 + \beta_1X_i + \epsilon_i </math> the fitted value is: <math> \hat{Y}_i = \hat{\beta}_0 + \hat{\beta}_1X_i </math> and the residual is: <math> e_i = Y_i-\hat{Y}_i </math> The OLS estimat...") Tag: Visual edit: Switched