def _update_parameters(self):
"""Update mean sd etc after we have updated our samples
"""
self.n = len(self.members)
self.mean = self.orig_mean = StatTool.calc_mean(self.members)
self.sd = self.orig_sd = StatTool.calc_sd(self.members,
self.is_population)
print("Got %d samples, mean: %.3f, sd: %.3f" %
(self.n, self.mean, self.sd))
def _fix_samples(self):
"""Decide if the two samples are dependent and we should do something
about it"""
samp_dependent = not self.samp0.is_population and not self.samp1.is_population
if samp_dependent and self.samp0.members and self.samp1.members:
members = [self.samp1.members[i] - self.samp0.members[i]
for i in range(len(self.samp1.members))]
self.samp0.mean = 0.0
self.samp0.sd = None
self.samp0.notes = "mean and sd have been reset"
self.samp1.mean = StatTool.calc_mean(members)
self.samp1.sd = StatTool.calc_sd(members, self.samp1.is_population)
self.samp1.notes = "mean and sd are difference from sample-0"
elif samp_dependent and self.samp0.orig_sd is not None and self.samp1.orig_sd is not None:
self.samp1.sd = self.standard_deviation_difference()
self.samp1.notes = "sd is difference from sample-0"