- 安全系数 ānquánxìshù safety factorthe ratio of the maximum load an engineering structure or machine can handle to the actual or design load
- 劲度系数 jìngdùxìshù stiffness coefficientcoefficient of stiffness or spring constant in Hooke's law
- 吉尼系数 jíníxìshù Gini coefficient(Taiwan) Gini coefficient, a measure of statistical dispersion used to represent income inequality or wealth inequality
- 坚尼系数 jiānníxìshù Gini coefficientHong Kong variant of [[基尼系数|基尼係數|ji1 ni2 xi4 shu4]]
- 基尼系数 jīníxìshù Gini coefficientA measure of statistical dispersion representing the income inequality within a nation or social group, ranging from zero to one where higher values indicate higher inequality.
- 相关系数 xiāngguānxìshù correlation coefficienta numerical value in statistics, ranging from -1 to +1, that represents the strength and direction of the relationship between two or more variables
- 置信系数 zhìxìnxìshù confidence coefficienta numerical value in statistics that represents the level of confidence in a certain outcome; confidence coefficient
- 二项式系数 èrxiàngshìxìshù binomial coefficient(math) binomial coefficient
- 膨胀系数 péngzhàngxìshù expansion coefficientthe ratio of the increase in volume or length of an object to its original size for every degree increase in temperature, also known as expansivity
- 偏相关系数 piānxiāngguānxìshù partial correlation coefficientA numerical value in statistics that measures the degree of association between two variables while keeping other variables constant