statsmodels.stats.weightstats._zstat_generic2¶
- statsmodels.stats.weightstats._zstat_generic2(value, std, alternative)[source]¶
generic (normal) z-test based on summary statistic
- The test statistic is :
zstat = value / std
and is assumed to be normally distributed with standard deviation
std
.- Parameters:
- value
float
orndarray
Value of a sample statistic, for example mean.
- value2
float
orndarray
Value, for example mean, of the second sample.
- std
float
orndarray
Standard error of the sample statistic value.
- alternative
str
The alternative hypothesis, H1, has to be one of the following
‘two-sided’ : H1:
value1 - value2 - diff
not equal to 0.‘larger’ : H1:
value1 - value2 - diff > 0
‘smaller’ : H1:
value1 - value2 - diff < 0
- value
- Returns: