condition mean min max ZT0-3 2621.3 2621.3 2621.3 ZT4-7 4650.2 4650.2 4650.2 ZT8-11 4772.950000000001 4772.950000000001 4772.950000000001 ZT12-15 4516.85 4516.85 4516.85 ZT16-19 3561.1000000000004 3561.1000000000004 3561.1000000000004 ZT20-23 2654.2 2654.2 2654.2