由假设得 E(Y=6+6,x Population regression equation (function) The pity is the parameters are unknown 我们要利用样本来估计参数.如得参数估计值 五和1,则=b+bXx称为 sample regression equation(function) How to estimate them? the ols method◼ 由假设得 Population regression equation (function) The pity is the parameters are unknown. 我们要利用样本来估计参数. 如得参数估计值 , 则 称为 sample regression equation (function). How to estimate them? The OLS method. 0 1 E Y b b X ( ) = + 0 1 ˆ ˆ b b 和 0 1 ˆ ˆ ˆ Y b b X = +