When determining empirical formula with test method, estimation value of estimated parameter in regressionequation which is obtained with least square method always is a long number.
用实验方法确定经验公式时，回归方程中用最小二乘方法求得的待估参数的估计值往往是一个很长的数。
2
Table 1 presents a regressionequation that is typical of the kind estimated in the happiness literature.
表1给出了回归方程，它是在幸福文献中评估的那种典型。
3
Based on the data of forest resources inventories of Henan Province in 2003, forest biomass carbon storage is estimated using regressionequation between biomass of various tree species and volume.