python statistics模块

用于数据统计的statistics模块的常用函数

1、statistics.mean() #求算术平均值

>>> import statistics
>>> date = [1,2,98,99]
>>> statistics.mean(date)
50

2、statistics.median() #计算数据的中位数，如果有两个中位数，则返回其平均值

>>> import statistics
>>> date = [11,12,13,14,15,16]
>>> statistics.median(date)
13.5

statistics.median_low() #数据中的低中位数

>>> import statistics
>>> date = [11,12,13,14,15,16]
>>> statistics.median_low(date)
13

statistics.median_high() #数据中的高中位数

>>> import statistics
>>> date = [11,12,13,14,15,16]
>>> statistics.median_high(date)
14

3、statistics.mode() #计算众数

>>> import statistics
>>> date = [1,2,2,3,3,3]
>>> statistics.mode(date)
3

4、statistics.pvariance() #计算数据的总体方差

>>> import statistics
>>> date = [11,12,13,14,15,16]
>>> statistics.pvariance(date)
2.9166666666666665