condition mean min max ZT0-3 651.7 651.7 651.7 ZT4-7 752.5 752.5 752.5 ZT8-11 588.95 588.95 588.95 ZT12-15 605.1 605.1 605.1 ZT16-19 863.2 863.2 863.2 ZT20-23 863.75 863.75 863.75