The survey's sampling error is plus or minus 3 percentage points for the overall responses and plus or minus 5.5 percentage points for the questions broken down by race.
调查的整体回覆采样误差率为正负3%，按照种族划分的调查采样误差率为正负5.5%。
2
Sampling variability explains only a portion of the overall uncertainty in a modelled estimate.
抽样变异性仅仅解释了模型估测中整个不确定性的一部分。
3
The overall structure and working principles of turbo-pressure and cycling seafloor sediment sampling drilling machine were introduced and the feasibility of the design was discussed.