For its corresponding function curve is smoother and the gap of the true value of the statistical points is smaller, using more smooth points can avoid making big errors/deviations.

• 用变换方法对样本进行变换得到新样本，新样本对应的函数曲线比较平缓，估计点的真实值相差很小，可以用较多的点平滑，不致产生太大的偏差。