condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.172856 0.172856 0.172856 ZT12-15 0.152052125 0.109541 0.19456325000000002 ZT16-19 0.0498815 0.0 0.099763 ZT20-23 0 0 0