condition mean min max ZT0-3 48.819335984999995 43.421614289999994 54.217057679999996 ZT4-7 58.902446714999996 56.97135641 60.83353702 ZT8-11 58.56808922166667 57.335907643333336 59.8002708 ZT12-15 57.989810238333334 51.80766441666667 64.17195606 ZT16-19 46.334447865 44.817593419999994 47.85130231 ZT20-23 45.301168365 43.678292813333336 46.92404391666667