weighted least square method

例句：

1. 1. The weightedleast squares method is used to estimate the parameters of a linear regression model.
   加权最小二乘法用于估计线性回归模型的参数。
2. 2. In this study, we applied the weighted least squares method to analyze the data.
   在这项研究中，我们应用了加权最小二乘法来分析数据。
3. 3. The weighted least squares method is often used in economics to estimate the impact of various policies on economic growth.
   加权最小二乘法在经济学中常被用来估计各种政策对经济增长的影响。