condition mean min max ZT0-3 0.129556525 0.08540255000000001 0.1737105 ZT4-7 0.2024975 0.2024975 0.2024975 ZT8-11 0.7228875 0.7228875 0.7228875 ZT12-15 0 0 0 ZT16-19 0.5693015 0.5693015 0.5693015 ZT20-23 0.48598399999999997 0.48598399999999997 0.48598399999999997