We tell prospective clients that if their main goal is to minimize standard deviation around the index, save money and buy an index fund. 我们会告诉潜在的客户,如果他们的主要目的是缩小与指数的标准差,那就省点钱去买指数基金。
This paper summarizes four major financial abilities of the listed company in China, and calculates the expected value and the standard deviation rate of the index of main rate which reflect these financial ability in the late five quarters. 本文概括了我国上市公司四大财务能力,并计算了反映这些财务能力的主要比率指标最近五个季度的数学期望值与标准离差率。
When updating databases, we show which factors could affect the mean and standard deviation of data summarization index or not. 当更新数据库时,我们指出哪些因素会影响数据概要指标的期望与均方差。
Based on ground observed information, standard deviation of spectrums, shape index, density and asymmetric of objects polygon are chosen as identification characteristics and fuzzy function is used to define the types of ploughed field. 然后选取影像中样地的光谱标准差、形状指数、对称度和密度作为耕地类别的识别特征,并采用模糊函数方法对各特征进行了定义。
The standard and standard deviation of plum rain intensity index are used to setup the classification standard of plum rain intensity state. 利用梅雨强度指数的标准值,应用其指数均方差建立了强度状态的分级标准。