type of frequency distribution

Methods Used blood-type-population-genetics method, 12000 blood donors from the Han nationality were enrolled into the investigation at random, and the distribution of ABO, Rh blood type antigen and their gene frequency were analyzed.

方法用血型群体遗传学研究方法，随机选择新乡市地区无血缘关系的汉族无偿献血者12000名，进行ABO、Rh血型系统的表现型及基因频率分布调查分析。

The frequency of each clinic type in GERD patients showed normal distribution.

GERD病人在三个临床分型中呈正态分布。

Results The frequency distribution that one person's three forms are of the same type is 32% in male and 37.1% in female.

结果：成都地区正常牙合人的面形、上牙弓形和切牙形三者一致性所占比率为男性32%、女性37.1%。