condition mean min max ZT0-3 7.997019516250001 7.8153238185000005 8.178715214 ZT4-7 10.444326347 9.278117223999999 11.61053547 ZT8-11 18.3165174525 13.71272669 22.920308215 ZT12-15 29.776035172500002 29.47485794 30.077212405 ZT16-19 24.49773132 24.083273315 24.912189325 ZT20-23 22.783193255 22.47374623 23.092640279999998