condition mean min max ZT0-3 399.2 399.2 399.2 ZT4-7 439.9 439.9 439.9 ZT8-11 525.0 525.0 525.0 ZT12-15 541.5 541.5 541.5 ZT16-19 348.45000000000005 348.45000000000005 348.45000000000005 ZT20-23 380.3 380.3 380.3