scipy.stats.pointbiserialr

scipy.stats.pointbiserialr(x, y)

Calculates a point biserial correlation coefficient and the associated p-value.

The point biserial correlation is used to measure the relationship between a binary variable, x, and a continuous variable, y. Like other correlation coefficients, this one varies between -1 and +1 with 0 implying no correlation. Correlations of -1 or +1 imply a determinative relationship.

Parameters :

x : array of bools

y : array of floats

Returns :

(point-biserial r, :

2-tailed p-value)

References

http://www.childrens-mercy.org/stats/definitions/biserial.htm