最小二乘法是预测方法的一种。预测分定性预测和定量预测。定性预测是依靠预测者的主观判断,预测未来发展趋势的方法。它虽有很多优点,但客观依据不足,预测的精度,完全取决于预测者的知识和 Least square method is one of the prediction methods. Forecast qualitative qualitative forecasting and quantitative forecasting. Qualitative forecasting is a method of predicting future trends based on subjective judgments of forecasters. Although it has many advantages, but the objective basis is not enough, the accuracy of prediction depends entirely on the predictor’s knowledge and