假设总体 meaning in English

hypothetical population
hypothetical universe

It is on the side of demand that we have to introduce quite new ideas when we are dealing with demand as a whole and no longer with the demand for a single product taken in isolation , with demand as a whole assumed to be unchanged
当我们讨论的是总体需求，而不再是假设总体需求不变条件下孤立地考察对单个产品的需求时，正是要在需求方面引入新观点。
In this paper , i study above two issues and gain some results as follows : 1 . under population follow normal distribution hypothesis , designing combine median - range adaptive control charts with variable sampling interval , variable sample size and variable control limit . it may be regarded as previously median - range extension
在假设总体服从正态分布的条件下，设计了抽样区间，样本容量和控制限都变化的全变化参数的中位值-极差联合控制图。它是以前的中位值-极差联合动态控制图的推广。