condition mean min max ZT0-3 26.8846 16.6696 33.55615 ZT4-7 12.9762 12.9762 12.9762 ZT8-11 8.322835 8.322835 8.322835 ZT12-15 21.17067 15.556239999999999 26.7851 ZT16-19 23.7608 23.7608 23.7608 ZT20-23 47.1977 47.1977 47.1977