>>> median.add_number(5)
>>> median.get_median()
5
+ >>> median.get_mean()
+ 5.2
+ >>> round(median.get_stdev(), 2)
+ 6.99
"""
def __init__(self):
mean = self.get_mean()
variance = 0.0
for n in self.lowers:
+ n = -n
variance += (n - mean) ** 2
for n in self.highers:
variance += (n - mean) ** 2