condition mean min max ZT0-3 68.94999999999999 68.94999999999999 68.94999999999999 ZT4-7 50.4 50.4 50.4 ZT8-11 41.05 41.05 41.05 ZT12-15 95.85 95.85 95.85 ZT16-19 71.85 71.85 71.85 ZT20-23 53.5 53.5 53.5