condition mean min max ZT0-3 180.4 180.4 180.4 ZT4-7 232.8 232.8 232.8 ZT8-11 204.9 204.9 204.9 ZT12-15 285.2 285.2 285.2 ZT16-19 292.5 292.5 292.5 ZT20-23 228.45 228.45 228.45