condition mean min max ZT0-3 0.86585 0.0 1.79324 ZT4-7 0.0 0.0 0.0 ZT8-11 3.0586349999999998 3.0586349999999998 3.0586349999999998 ZT12-15 2.815265 1.90145 3.72908 ZT16-19 1.601015 1.601015 1.601015 ZT20-23 1.806825 1.806825 1.806825