condition mean min max ZT0-3 44.5246 43.712199999999996 45.337 ZT4-7 31.747899999999998 31.747899999999998 31.747899999999998 ZT8-11 31.73655 31.73655 31.73655 ZT12-15 0 0 0 ZT16-19 44.2464 44.2464 44.2464 ZT20-23 41.5824 41.5824 41.5824