condition mean min max ZT0-3 0.56320375 0.5500775 0.57633 ZT4-7 0.976314 0.976314 0.976314 ZT8-11 2.112365 2.112365 2.112365 ZT12-15 0 0 0 ZT16-19 2.56492 2.56492 2.56492 ZT20-23 1.013338 1.013338 1.013338