condition mean min max ZT0-3 4.8239197315 4.383713389 5.264126074 ZT4-7 12.7694117555 6.605252096000001 18.933571415 ZT8-11 26.8688803175 26.240163844999998 27.497596790000003 ZT12-15 26.38725376 23.18768889 29.586818630000003 ZT16-19 41.2026025325 39.480090895000004 42.92511417 ZT20-23 29.788882245 27.171123725 32.406640765