condition mean min max ZT0-3 4640.1 4640.1 4640.1 ZT4-7 4859.9 4859.9 4859.9 ZT8-11 5525.6 5525.6 5525.6 ZT12-15 6895.75 6895.75 6895.75 ZT16-19 7278.450000000001 7278.450000000001 7278.450000000001 ZT20-23 6110.4 6110.4 6110.4