condition mean min max ZT0-3 16.1747 15.80115 16.54825 ZT4-7 24.525399999999998 24.525399999999998 24.525399999999998 ZT8-11 26.4399 26.4399 26.4399 ZT12-15 0 0 0 ZT16-19 13.03305 13.03305 13.03305 ZT20-23 15.24095 15.24095 15.24095