condition mean min max ZT0-3 60.14978333333333 57.320750000000004 65.63204999999999 ZT4-7 44.3472 44.3472 44.3472 ZT8-11 46.634299999999996 46.634299999999996 46.634299999999996 ZT12-15 72.3591 65.47149999999999 79.2467 ZT16-19 58.954499999999996 58.954499999999996 58.954499999999996 ZT20-23 67.34765 67.34765 67.34765