# ttest_ind¶

numeric.stats.ttest_ind(a, b)

Calculates the T-test for the means of TWO INDEPENDENT samples of scores.

This is a two-sided test for the null hypothesis that 2 independent samples have identical average (expected) values. This test assumes that the populations have identical variances.

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

random.seed(1)
# Create sample data.
a = random.randn(40)
b = 4 * random.randn(50)

r = stats.ttest_ind(a, b)
print r


Result:

>>> run script...
(1.4947945927091304, 0.14061883167278577)