ttest_rel

numeric.stats.ttest_rel(a, b)

Calculates the T-test on TWO RELATED samples of scores, a and b.

This is a two-sided test for the null hypothesis that 2 related or repeated samples have identical average (expected) values.

Parameters:
  • a – (array_like) Sample data a.
  • b – (array_like) Sample data b.
Returns:

t-statistic and p-value

Examples:

from mipylib.numeric import stats

a = [3,5,4,6,5,5,4,5,3,6,7,8,7,6,7,8,8,9,9,8,7,7,6,7,8]
b = [7,8,6,7,8,9,6,6,7,8,8,7,9,10,9,9,8,8,4,4,5,6,9,8,12]
t,p=stats.ttest_rel(a,b)
print 't-statistic: %f' % t
print 'p-value: %f' % p

Result:

>>> run script...
t-statistic: -2.449490
p-value: 0.021983