condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.109971 0.109971 0.109971 ZT8-11 0.030023 0.030023 0.030023 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0