condition mean min max ZT0-3 220.8 220.8 220.8 ZT4-7 140.1 140.1 140.1 ZT8-11 118.55000000000001 118.55000000000001 118.55000000000001 ZT12-15 117.6 117.6 117.6 ZT16-19 227.65 227.65 227.65 ZT20-23 275.35 275.35 275.35