condition mean min max ZT0-3 0.16463650000000002 0.092468 0.23680500000000002 ZT4-7 0.18977 0.18977 0.18977 ZT8-11 0.7359055 0.7359055 0.7359055 ZT12-15 0 0 0 ZT16-19 0.4426745 0.4426745 0.4426745 ZT20-23 0.398161 0.398161 0.398161