`scipy.stats._mstats_basic:ttest_rel`

Signature

def ttest_rel(a, b, axis = 0, alternative = two-sided)

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

a, b : array_like

The arrays must have the same shape.

axis : int or None, optional

Axis along which to compute test. If None, compute over the whole arrays, a, and b.

alternative : {'two-sided', 'less', 'greater'}, optional

Defines the alternative hypothesis. The following options are available (default is 'two-sided'):

'two-sided': the means of the distributions underlying the samples are unequal.
'less': the mean of the distribution underlying the first sample is less than the mean of the distribution underlying the second sample.
'greater': the mean of the distribution underlying the first sample is greater than the mean of the distribution underlying the second sample.