condition mean min max ZT0-3 12.4999 12.4999 12.4999 ZT4-7 7.777800000000001 7.777800000000001 7.777800000000001 ZT8-11 13.337 13.337 13.337 ZT12-15 13.8322 13.8322 13.8322 ZT16-19 16.73895 16.73895 16.73895 ZT20-23 15.501449999999998 15.501449999999998 15.501449999999998