condition mean min max ZT0-3 26.943060805 21.90330143 31.982820179999997 ZT4-7 57.680854715 49.006988855 66.354720575 ZT8-11 119.765737925 86.49955324999999 153.0319226 ZT12-15 115.94172676 89.66929537 142.21415815 ZT16-19 54.8441198325 48.948563665 60.739676 ZT20-23 34.48875578 30.596231925 38.381279635