statsmodels.stats.weightstats.DescrStatsW.ttest_mean

DescrStatsW.ttest_mean(value=0, alternative='two-sided')

ttest of Null hypothesis that mean is equal to value.

The alternative hypothesis H1 is defined by the following ‘two-sided’: H1: mean not equal to value ‘larger’ : H1: mean larger than value ‘smaller’ : H1: mean smaller than value

Parameters:

• value (float or array) – the hypothesized value for the mean
• alternative (string) –

  The alternative hypothesis, H1, has to be one of the following

  ’two-sided’: H1: mean not equal to value (default) ‘larger’ : H1: mean larger than value ‘smaller’ : H1: mean smaller than value

Returns:

• tstat (float) – test statisic
• pvalue (float) – pvalue of the t-test
• df (int or float)