condition mean min max ZT0-3 68.162071 68.162071 68.162071 ZT4-7 89.723474 89.723474 89.723474 ZT8-11 96.71302299999999 96.71302299999999 96.71302299999999 ZT12-15 90.083322 90.083322 90.083322 ZT16-19 121.88360699999998 121.88360699999998 121.88360699999998 ZT20-23 85.2234915 85.2234915 85.2234915