condition mean min max ZT0-3 0.05435225 0.0 0.1087045 ZT4-7 0.0 0.0 0.0 ZT8-11 9.400055 9.400055 9.400055 ZT12-15 0 0 0 ZT16-19 2.77886 2.77886 2.77886 ZT20-23 0.5352495 0.5352495 0.5352495