condition mean min max ZT0-3 37.05815 36.86965 37.24665 ZT4-7 27.49415 27.49415 27.49415 ZT8-11 23.2928 23.2928 23.2928 ZT12-15 0 0 0 ZT16-19 37.295500000000004 37.295500000000004 37.295500000000004 ZT20-23 36.06695 36.06695 36.06695