condition mean min max ZT0-3 51.19605 39.45615 60.029650000000004 ZT4-7 31.4601 31.4601 31.4601 ZT8-11 28.622349999999997 28.622349999999997 28.622349999999997 ZT12-15 47.5296 45.35995 49.69925 ZT16-19 44.3119 44.3119 44.3119 ZT20-23 48.453649999999996 48.453649999999996 48.453649999999996