condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0101805275 0.0 0.020361055 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0203590405 0.0 0.040718081 ZT20-23 0.0106480725 0.0 0.021296145