condition mean min max ZT0-3 86.15 86.15 86.15 ZT4-7 95.1 95.1 95.1 ZT8-11 63.2 63.2 63.2 ZT12-15 85.05000000000001 85.05000000000001 85.05000000000001 ZT16-19 96.3 96.3 96.3 ZT20-23 70.7 70.7 70.7