频次分布 meaning in English

frequency distribution

The six sigma black belt should be able to read values from a cumulative frequency ogive
译文：六西格玛黑带应该能够从累计频次分布中读出数值。
The six sigma black belt should be able to compute the mean and standard deviation from a grouped frequency distribution
6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 six sigma black belt should be able to compute the mean and standard deviation from a grouped frequency distribution
译文：六西格玛黑带应该能够计算出一个分组发生频次分布数据的均值和标准偏差。
The climate factor distribution coincide very well with the dust storm occurrence frequency distribution , which suggested that the climate changes induced the dust storm downward trend in whole during these 40 years in china
结果发现气候因子分布与沙尘暴的发生频次分布对应性很好，提出气候变迁导致在这40年中国沙尘暴整体上呈现出下降趋势。