>>> statistics.mean([1, 2, 3, 4, 5])
3
>>> from fractions import Fraction as F
>>> statistics.mean([F(4, 7), F(4, 21), F(5, 4), F(1, 4)])
Fraction(95, 168)
>>> from decimal import Decimal as D
>>> statistics.mean([D("0.5"), D("0.78"), D("0.88"), D("0.988")])
Decimal('0.787')

>>> statistics.harmonic_mean([4, 5, 7])
5.0602409638554215

>>> statistics.median([1, 4, 7])
4
>>> statistics.median([1, 4, 7, 10])
5.5
median_low(data)函數(shù)
median_low(data) 函數(shù)用于計算一組數(shù)據(jù)的中小值。如果數(shù)據(jù)的個數(shù)是單數(shù)，則中小值是中間的數(shù)；如果數(shù)據(jù)的個數(shù)是復(fù)數(shù)，則中小值是中間兩個數(shù)中最小的數(shù)。例如：
>>> statistics.median_low([1, 4, 7])
4
>>> statistics.median_low([1, 4, 7, 10])
4

>>> statistics.median_high([1, 4, 7])
4
>>> statistics.median_high([1, 4, 7, 10])
7
median_grouped(data, interval=1)函數(shù)
median_grouped(data, interval=1) 函數(shù)用于計算分組連續(xù)數(shù)據(jù)的中位數(shù)。其中 interval 表示數(shù)據(jù)之間的間隔，即組距。此函數(shù)計算方法較復(fù)雜，可參考公式 中位數(shù)=中位數(shù)所在組下限+{[(樣本總數(shù)/2-到中位數(shù)所在組下限的累加次數(shù))/中位數(shù)所在組的次數(shù)]*中位數(shù)的組距} ,如果數(shù)據(jù)是空的會報 StatisticsError 錯誤。例如：
>>> statistics.median_grouped([1, 2, 2, 3, 4, 4, 4, 4, 4, 5])
3.7
>>> statistics.median_grouped([3, 4, 4, 5, 6], interval=1)
4.25
>>> statistics.median_grouped([1, 3, 5, 5, 7], interval=2)
4.5

>>> statistics.mode([1, 1, 2, 3, 3, 3, 3, 4])
3
>>> statistics.mode(["red", "blue", "blue", "blue", "green", "green", "red"])
'blue'