Stats Functions

birdman.stats.hotelling_ttest(inference_object: InferenceData, coord: dict, parameter: str = 'beta_var') → Tuple[float64, float64]

Test if covariate-draws centered around zero.

Uses Hotelling’s T-squared test to determine whether a given covariate coefficient is centered around zero (null hypothesis: centered around 0).

Parameters

  • inference_object (az.InferenceData) – Inference object with posterior draws

  • coord (dict) – Coordinates to test

  • parameter (str, optional) – Name of parameter to test, defaults to ‘beta_var’

Returns

\(t^2\) & p-value

Return type

Tuple(float, float)