condition mean min max ZT0-3 96.7 96.7 96.7 ZT4-7 87.9 87.9 87.9 ZT8-11 75.69999999999999 75.69999999999999 75.69999999999999 ZT12-15 34.8 34.8 34.8 ZT16-19 119.1 119.1 119.1 ZT20-23 104.85 104.85 104.85