condition mean min max ZT0-3 3381.35 3381.35 3381.35 ZT4-7 2716.8 2716.8 2716.8 ZT8-11 2505.5 2505.5 2505.5 ZT12-15 2506.5 2506.5 2506.5 ZT16-19 2503.8 2503.8 2503.8 ZT20-23 2644.3 2644.3 2644.3