condition mean min max ZT0-3 1.25135875 1.1454650000000002 1.3572525 ZT4-7 1.4262825000000001 1.4262825000000001 1.4262825000000001 ZT8-11 1.8605 1.8605 1.8605 ZT12-15 0 0 0 ZT16-19 2.266025 2.266025 2.266025 ZT20-23 1.2278815 1.2278815 1.2278815