condition mean min max ZT0-3 121.35 121.35 121.35 ZT4-7 67.9 67.9 67.9 ZT8-11 129.6 129.6 129.6 ZT12-15 76.6 76.6 76.6 ZT16-19 132.35000000000002 132.35000000000002 132.35000000000002 ZT20-23 138.7 138.7 138.7