| 单词 | average |
| 释义 | average A statistical summary measure of size. The average of a set of numbers may be weighted or unweighted. The unweighted average or arithmetic mean of a set of N numbers x1, x2,…xN is their sum divided by N, written (∑i xi)/N. In an unweighted average an equal weight is given to each number; this is often appropriate if the data concern individuals. A weighted average gives a ‘weight’ to each observation, denoted wi ; it is then the sum of the products of observations and their weights, (xi wi ), divided by the sum of the weights, written (∑i xi wi )/(∑i wi ). A weighted average is appropriate in considering, for example, the average income of people in Latin America. Brazil has far more inhabitants than Uruguay, and if the xi were average income for each country, natural weights wi would be the populations of the various countries. See also: moving average, unweighted average, and weighted average |
| 随便看 |
|
英汉经管词典收录了3426条经济管理类英汉双解词条，基本涵盖了经济学、管理学、金融学、会计学、证券期货、商务活动等领域的常用英语单词及短语词组的翻译及用法，是学习及工作的有利工具。