condition mean min max ZT0-3 0.20483039649999998 0.0 0.40966079299999997 ZT4-7 0.64100628275 0.33051263649999996 0.9514999290000001 ZT8-11 2.35135939175 1.90875151 2.7939672735 ZT12-15 3.46216977125 3.0118347515 3.912504791 ZT16-19 2.4249179305 2.2211570025 2.6286788585 ZT20-23 2.43577107025 2.2231659715 2.648376169