condition mean min max ZT0-3 53.925 53.925 53.925 ZT4-7 49.746849999999995 49.746849999999995 49.746849999999995 ZT8-11 43.15915 43.15915 43.15915 ZT12-15 47.0839 47.0839 47.0839 ZT16-19 51.099133333333334 51.099133333333334 51.099133333333334 ZT20-23 57.7174 57.7174 57.7174