condition mean min max ZT0-3 103.924367 103.924367 103.924367 ZT4-7 66.6182095 66.6182095 66.6182095 ZT8-11 74.05394150000001 74.05394150000001 74.05394150000001 ZT12-15 77.5475185 77.5475185 77.5475185 ZT16-19 160.010242 160.010242 160.010242 ZT20-23 91.486401 91.486401 91.486401