组中值是各组的实际平均数的近似代表值，因此，用组中值来计算总平均数，只是一个近似值。
参考答案：对
一般能力测验，也即我们通常所说的（）
A.想象力测验
B.执行力测验
C.智力测验
D.影响力测验
As a project manager, the most important activity to ensure customer and stakeholder satisfaction is ______ .
A) documenting the performance measurementsB) reporting changes and updating the project plan and other project documents where appropriateC) reporting project status timely and regularlyD) documenting the requirements
