condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.276484 0.276484 0.276484 ZT8-11 0.6010949999999999 0.6010949999999999 0.6010949999999999 ZT12-15 0 0 0 ZT16-19 0.090792 0.090792 0.090792 ZT20-23 0.0918135 0.0918135 0.0918135