condition mean min max ZT0-3 399.6 399.6 399.6 ZT4-7 298.1 298.1 298.1 ZT8-11 263.5 263.5 263.5 ZT12-15 352.5 352.5 352.5 ZT16-19 447.75 447.75 447.75 ZT20-23 439.4 439.4 439.4