condition mean min max ZT0-3 56.4734 49.4785 63.4683 ZT4-7 24.39405 24.39405 24.39405 ZT8-11 18.41975 18.41975 18.41975 ZT12-15 0 0 0 ZT16-19 30.589599999999997 30.589599999999997 30.589599999999997 ZT20-23 44.183949999999996 44.183949999999996 44.183949999999996