condition mean min max ZT0-3 91.639325 91.639325 91.639325 ZT4-7 640.184255 640.184255 640.184255 ZT8-11 703.406569 703.406569 703.406569 ZT12-15 352.78672 352.78672 352.78672 ZT16-19 164.826886 164.826886 164.826886 ZT20-23 114.010268 114.010268 114.010268