A measure of risk removed, i.e., the reduction of variance of key project metrics.
去除的风险测量，即，减少关键项目度量标准的方差。
2
Statistical methods for combining the results of studies generally weight the influence of each study by the inverse of the variance for the estimated measure of effect.
合并研究结果的统计学方法通常采用待估效应测量值的方差的倒数来对每一个研究的影响进行加权。
3
The average size is 3,131 square feet, with a standard deviation of 655 square feet. (Standard deviation is a statistical measure of variance.)