condition mean min max ZT0-3 488.0 488.0 488.0 ZT4-7 711.9 711.9 711.9 ZT8-11 732.7 732.7 732.7 ZT12-15 858.1500000000001 858.1500000000001 858.1500000000001 ZT16-19 623.95 623.95 623.95 ZT20-23 411.2 411.2 411.2