condition mean min max ZT0-3 66.672525 66.50715 66.83789999999999 ZT4-7 60.2331 60.2331 60.2331 ZT8-11 67.94665 67.94665 67.94665 ZT12-15 0 0 0 ZT16-19 58.363249999999994 58.363249999999994 58.363249999999994 ZT20-23 68.18504999999999 68.18504999999999 68.18504999999999