The binomial distribution is used to represent the number of success that occurs within n independent trials||二项式分布是用来描述独立试验在n内成功发生数的. Data are integers between and including 0 and n||数据是整数包括0和n
The probability density function (pdf) is||概率密度函数(pdf) 是:
f(x)=combin(n,x)px(1-p)n-x(注明:这里x和n-x为上标因为无法粘贴图片暂时写成这样)
where||式中:
n = number of trials||n = 试验的数
p = probability of success||p = 成功的概率
mean = np||平均值= np
variance = np(1  p)‖方差=np(1-p)