condition mean min max ZT0-3 456.25 456.25 456.25 ZT4-7 443.4 443.4 443.4 ZT8-11 201.95 201.95 201.95 ZT12-15 289.45 289.45 289.45 ZT16-19 314.35 314.35 314.35 ZT20-23 369.8 369.8 369.8