# statsmodels.stats.weightstats.DescrStatsW.ttest_mean¶

method

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

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
valuefloat or array

the hypothesized value for the mean

alternativestring

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
tstatfloat

test statisic

pvaluefloat

pvalue of the t-test

dfint or float