condition mean min max ZT0-3 84.30000000000001 84.30000000000001 84.30000000000001 ZT4-7 80.1 80.1 80.1 ZT8-11 95.6 95.6 95.6 ZT12-15 87.65 87.65 87.65 ZT16-19 86.25 86.25 86.25 ZT20-23 48.3 48.3 48.3