condition mean min max ZT0-3 71.5 71.5 71.5 ZT4-7 89.1 89.1 89.1 ZT8-11 139.7 139.7 139.7 ZT12-15 266.25 266.25 266.25 ZT16-19 284.3 284.3 284.3 ZT20-23 138.4 138.4 138.4