condition mean min max ZT0-3 363.75 363.75 363.75 ZT4-7 380.8 380.8 380.8 ZT8-11 366.5 366.5 366.5 ZT12-15 234.6 234.6 234.6 ZT16-19 473.75 473.75 473.75 ZT20-23 637.55 637.55 637.55