condition mean min max ZT0-3 194.9 194.9 194.9 ZT4-7 163.0 163.0 163.0 ZT8-11 175.45 175.45 175.45 ZT12-15 228.35 228.35 228.35 ZT16-19 242.45 242.45 242.45 ZT20-23 232.9 232.9 232.9