The Six Sigma Black Belt should be able to compute the mean and standard deviation from a grouped frequency distribution.
西格玛黑带应能从一组频次分布数据计算出均值和标准偏差。the frequency and duration of aggressiveness between female pikas do not decrease with days significantly.
雌性高原鼠兔之间的攻击行为频次和持续时间无显著直线下降且各时期之间其差异亦不显著；And the impact factors and number of citations of these journals, though grow rapidly, still far behind world average.
同时，尽管期刊的影响因子和被引用频次增长很快，但同世界平均水平的绝对差距并没有缩小。Besides being few and far between, campus lectures also fail to meet students' expectations in terms of quality.
校园讲座不但数量少，频次低，其质量也很难达到学生的预期。Development teams run their applications on this environment on an even less frequent basis.
开发人员在这种环境中运行他们的应用程序的频次会更少。The results show that the extreme heavy precipitation event frequency greatly affects the amount of total precipitation in flood season.
结果表明：长江中下游汛期极端强降水事件发生频次的多寡很大程度上影响着汛期总降水量的多少。The spatial distribution of extreme heavy precipitation event frequency can be divided into five main regions.
长江中下游地区汛期极端强降水事件发生频次的空间分布可分为5个主要区域。The original Beijing - Urumqi - Karadzic route change to Beijing - Chengdu - Radovan Karadzic, to twice weekly frequency of implementation.
而原北京-乌鲁木齐-卡拉季奇航线变更为北京-成都-卡拉季奇，以每周两班的频次执行。It's not necessarily the size of your foot, but where you step, how frequently, and how hard.
和脚的大小不一定有关，而是和你踩下的位置、频次和力度有关。