condition mean min max ZT0-3 81.0 81.0 81.0 ZT4-7 70.5 70.5 70.5 ZT8-11 88.30000000000001 88.30000000000001 88.30000000000001 ZT12-15 77.1 77.1 77.1 ZT16-19 97.94999999999999 97.94999999999999 97.94999999999999 ZT20-23 53.95 53.95 53.95