condition mean min max ZT0-3 388.511204 388.511204 388.511204 ZT4-7 1184.4926785 1184.4926785 1184.4926785 ZT8-11 1166.13989 1166.13989 1166.13989 ZT12-15 1005.8001409999999 1005.8001409999999 1005.8001409999999 ZT16-19 684.9442605 684.9442605 684.9442605 ZT20-23 525.932744 525.932744 525.932744