condition mean min max ZT0-3 91.35 91.35 91.35 ZT4-7 70.1 70.1 70.1 ZT8-11 69.1 69.1 69.1 ZT12-15 105.9 105.9 105.9 ZT16-19 97.6 97.6 97.6 ZT20-23 95.25 95.25 95.25