condition mean min max ZT0-3 0.44704699999999997 0.3443845 0.5497095 ZT4-7 0.43095249999999996 0.43095249999999996 0.43095249999999996 ZT8-11 0.12882675 0.12882675 0.12882675 ZT12-15 0 0 0 ZT16-19 0.3813342 0.3813342 0.3813342 ZT20-23 0.722997 0.722997 0.722997