deviations
n. 差异,偏差(deviation 复数)
例句
The Chinese used a gravity meter to correct for local deviations in sea level.
中国人用重力仪来校正海平面的局部偏差。
So you can have negative deviations.
那么你会有负的偏差。
And give two standard deviations from your answer.
从答案里给出两个标准差。