典型抽样是凭人们主观意识选择具有代表性的地段设置标准地进行实测,据以推算整体。这种抽样调查方法,二十多年来一直被广泛应用。主要是此法操作简单,容易掌握,工作量小,速度快,且计算简便;但是此法不能用数理统计方法进行计算调查成果的精度,加之调查人员的 Typical sampling is based on people’s subjective consciousness to select a representative lot to set the standard test, according to the projection of the whole. This sampling method has been widely used for more than two decades. Mainly this method is simple, easy to grasp, small workload, fast, and easy to calculate; but this method can not use mathematical statistics to calculate the accuracy of the survey results, combined with the investigators