ALTER TABLE public.scores ADD COLUMN mean_error float8;
ALTER TABLE public.scores ADD COLUMN error_variance float8;
ALTER TABLE public.scores ADD COLUMN error_standard_deviation float8;
ALTER TABLE public.scores ADD COLUMN minimum_error float8;
ALTER TABLE public.scores ADD COLUMN maximum_error float8;
ALTER TABLE public.scores ADD COLUMN error_range float8;
ALTER TABLE public.scores ADD COLUMN error_coefficient_of_variation float8;
ALTER TABLE public.scores ADD COLUMN error_kurtosis float8;
ALTER TABLE public.scores ADD COLUMN error_skewness float8;