condition mean min max ZT0-3 75.055614 75.055614 75.055614 ZT4-7 96.6263635 96.6263635 96.6263635 ZT8-11 96.78858500000001 96.78858500000001 96.78858500000001 ZT12-15 108.012978 108.012978 108.012978 ZT16-19 93.10713150000001 93.10713150000001 93.10713150000001 ZT20-23 95.1696015 95.1696015 95.1696015