代表数是用来描述和代表研究对象的一般水平的,并用它与同质的另一研究对象作比较.反映试验数据集中趋势的代表数常有:算术平均数、几何平均数、调和平均数、中数和众数.除中数和众数外,算术平均数是最常用的统计量.因它计算简捷,使 The number of delegates is used to describe and represent the general level of the subject and to compare it with that of another subject of the same type of representation. The number of representatives that reflect trends in the test data often includes: arithmetic mean, geometric mean, harmonic mean , In the number and mode. In addition to the number and mode, the arithmetic average is the most commonly used statistics. Because of its simple calculation, so that