normal frequency distribution

基本解释

The distribution frequency of fiber length and width was basically in normal;
白桦纤维长度和宽度频率分布基本呈正态分布；
Results:The frequency of blood pressure presented a normal distribution and twin peak sign through the twinborn analytical method and group investigation.
结果：双生儿分析法和群体调查其血压频数分布呈正偏态分布和出现双峰的现象；
Statistics histogram data processing scheme is designed. Standard deviation of frequency modulation is found out according to normal distribution characteristics.
设计了统计直方图数据处理方案，按照正态分布的特性找出了寄生频率调制的标准偏差。