这方面尤其如此，因为贵国那个地区的不同地方差别很大。
This is especially so, since there are such vast differences between the various places in that part of your country.
协变和逆变的区别对于张量的计算尤为重要，这往往会出现混合方差。
The distinction between covariance and contravariance is important for computations with tensors, which often have mixed variance.
另一方面，可以将此方差忽略。
图3：方差区间内完成任务的可能性。
Figure 3: Likelihood of completing a task within the variance interval.
非常量误差方差或异方差性。
由模型说明的方差比例范围为21%至28%。
The proportions of the variance explained by the models ranged from 21% to 28%.
应该用控制循环来管理项目，促使项目方差为零。
Projects should be governed using a control loop to drive project variance to zero.Figure 8: project governance control loop.
估计项目的成本、工作，和持续时间，以及其方差。
Estimate the project's cost, effort, and duration, along with its variance.
随机变量的方差衡量随机变量值与期望值偏离的程度。
The variance of a random variable measures how far from the expected value its values typically are.
去除的风险测量，即，减少关键项目度量标准的方差。
A measure of risk removed, i.e., the reduction of variance of key project metrics.
注意到风险的严重程度直接关系到项目参数的估计中的方差。
Note that severity of risk is directly related to the variance in the estimation of a project's parameters.
采用循环控制迭代生命周期模型，将项目方差用作一个控制器。
Adopt a control-loop iterative lifecycle model using project variance as a control.
注意选择度量标准的指导原则是它们怎样影响具体项目参数的方差。
Note that a guiding principle for choosing metrics is how they will affect a specific project parameter's variance.
因此，由于在新知识的获取方面进行合作交流，方差随着时间减少了。
Hence, the variance diminishes over time due to collaborative interaction on new knowledge acquisition.
假设估算的任务持续时间是3个月，并且估计的方差是1 个月。
Suppose the estimated duration of a task is 3 months, and the variance of the estimate is 1 month.
可以用两种基本方法来找到满足最小方差法的估计值m和b。
The estimators, m and b, that satisfy the least-squared-error criterion can be found in two basic ways.
很明显，随着项目参数估计中方差的增加，成功完成项目的可能性就减少。
Clearly, as the variance in the estimates of project parameters increases, the likelihood of completing the project successfully decreases.
您可以利用此函数将您的样本方差计算转换为样本标准差计算，如清单8所示。
You can use it to turn your variance measurement into a standard deviation measurement, as shown in Listing 8.
例如，与项目成本或持续时间无关的度量标准不能帮助评估迭代中的方差削减。
For example, a metric that does not correlate to the project cost or duration cannot aid in assessing the variance reduction in the iterations.
这个简单线性回归过程中的下一步是确定其余的预测方差是否可以接受。
The next step in the simple linear regression procedure is to determine if the remaining squared error of prediction is acceptable or not.
3方差的专业定义是随机变量的二次中心矩，与期望值之差的平方的加权平均值。
The technical definition of variance is the random variable's second central moment, the weighted average of the square of the differences from the expected value.
该方法基于一个隐含的假设，即可以肯定地做出计划：也就是，持续时间的方差非常低。
It is based on the implicit assumption that the plan can be made with certainty: i.e., that the variance of the durations is very low.
共由65个国家参与的测试结果显示，智利的教育按照社会阶级方差排序处于第64位。
Analysis done in Chile of the test results in the 65 countries that took part finds that it ranked 64th in terms of the variance of the results according to social class.
尽管全球化趋势不断加强，地方差异性依然主宰着大型零售业，Terry说。
Despite globalisation, local differences still hold sway over mass retailing, says Sir Terry.
要想将上面所讨论的所有内容都成为可实行的，团队必须找到一个计算项目参数方差的方法。
For all of the above discussion to be practical, the team must find a way to compute the variance of the project parameters.
减少方差需要协作，但较多的协作导致员工花费较多时间交互，而很少的时间生成规划工件。
Reducing variance requires collaboration, but more collaboration results in more of the staff effort being spent interacting and less on the generation of the program artifacts.
使用最小方差法来确定最吻合的直线涉及寻找使预测方差最小的m和b的估计值。
Using a least-squared-error criterion to determine the line of best fit involves finding estimates of m and b that minimize the squared error of prediction.
使用最小方差法来确定最吻合的直线涉及寻找使预测方差最小的m和b的估计值。
Using a least-squared-error criterion to determine the line of best fit involves finding estimates of m and b that minimize the squared error of prediction.
应用推荐