Standard deviation In statistics, a measure of the dispersion of a frequency distribution: it is the average magnitude of deviations from the center of normal curve, calculated by squaring all the deviations, calculating their mean, then finding the squar
Standard deviation In statistics, a measure of the dispersion of a frequency distribution: it is the average magnitude of deviations from the center of normal curve, calculated by squaring all the deviations, calculating their mean, then finding the squar
标准偏差：统计中，一种衡量数据组分布的分散或变化情况的数据，是偏离正态分布中间位置数据大小的平均值。