condition mean min max ZT0-3 87.924485 87.924485 87.924485 ZT4-7 86.532944 86.532944 86.532944 ZT8-11 121.24066300000001 121.24066300000001 121.24066300000001 ZT12-15 140.716558 140.716558 140.716558 ZT16-19 166.9712345 166.9712345 166.9712345 ZT20-23 159.109527 159.109527 159.109527