condition mean min max ZT0-3 0.36062099999999997 0.343686 0.377556 ZT4-7 0.347259 0.347259 0.347259 ZT8-11 0.538114 0.538114 0.538114 ZT12-15 0 0 0 ZT16-19 0.30057049999999996 0.30057049999999996 0.30057049999999996 ZT20-23 0.3766005 0.3766005 0.3766005