condition mean min max ZT0-3 115.75 115.75 115.75 ZT4-7 134.4 134.4 134.4 ZT8-11 138.35 138.35 138.35 ZT12-15 132.2 132.2 132.2 ZT16-19 139.95 139.95 139.95 ZT20-23 122.85000000000001 122.85000000000001 122.85000000000001