condition mean min max ZT0-3 37.27676043525 12.0666248905 62.48689598 ZT4-7 19.50060973125 13.6533518275 25.347867635 ZT8-11 9.110066337500001 7.307205966 10.912926709 ZT12-15 5.314227671749999 5.251930574499999 5.3765247689999995 ZT16-19 12.0333717975 10.553234415 13.51350918 ZT20-23 7.197673116 5.0088869815 9.3864592505