| 单词 | 平均值 |
| 释义 | 〔low〕Below an average or a standard:低水平的：低于平均值或标准的：〔statistic〕A numerical value, such as standard deviation or mean, that characterizes the sample or population from which it was derived.统计值：一种能代表它来自的样本或总体特征的数值，如标准偏差或平均值〔average〕near the average in size.大小接近平均值〔centroid〕The point in a system of masses each of whose coordinates is a weighted mean of coordinates of the same dimension of points within the system, the weights being determined by the density function of the system.质心：质量系统内一点，其重量坐标是该系统内同维数上所有点坐标的平均值，重量由该系统的密度值决定〔equate〕To reduce to a standard or an average; equalize.使平衡：使削减到一个标准或平均值；使平衡〔long〕Extending beyond an average or a standard:超过的：延伸超过平均值或标准的：〔average〕average a set of numbers.取一组数的平均值〔low〕Below average in degree, intensity, or amount:少的，低下的：在程度、强度或数量上低于平均值的：〔covariance〕A statistical measure of the variance of two random variables that are observed or measured in the same mean time period. This measure is equal to the product of the deviations of corresponding values of the two variables for their respective means.协方差：在观察或测量同一平均时间的两个任意变量的变化的一个统计值。这个值等于这两变量的各自平均值偏离其相应值的乘积 |
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