The standard deviation is the squareroot of the variance.
标准差是方差的平方根。
2
Methods Valid chlorine content measurement method and statistical methods such as standard deviation, and square and root etc in "Technical standard For Disinfection" (2002 version) was adopted.
方法采用《消毒技术规范》(2002年版)有效氯含量测定方法以及标准偏差、方和根等统计学方法。
3
Besides a comparison of the characteristic line, the normalized mean squareroot error, the normalized mean error, and the maximum deviation are calculated and discussed.