condition mean min max ZT0-3 0.647684 0.6433465 0.6520215 ZT4-7 0.39917749999999996 0.39917749999999996 0.39917749999999996 ZT8-11 0.4537515 0.4537515 0.4537515 ZT12-15 0 0 0 ZT16-19 0.580724 0.580724 0.580724 ZT20-23 0.6861195 0.6861195 0.6861195