arch.univariate.excess_kurtosis¶

arch.univariate.excess_kurtosis(std_resid: Sequence[float] | ndarray[tuple[int], dtype[float64]] | Series) → float[source]¶

Sample excess kurtosis of standardized residuals.

Parameters:¶

std_resid: Sequence[float] | ndarray[tuple[int], dtype[float64]] | Series¶

Standardized residuals. Non-finite observations are removed before computing the statistic, since the residuals of a fitted model are NaN outside the estimation sample.

Returns:¶

Sample excess kurtosis computed using sample central moments.

Return type:¶

float

Raises:¶

• TypeError – If std_resid cannot be converted to numbers.

• ValueError – If std_resid is not 1-d or has no finite observation.