condition mean min max ZT0-3 35.15 35.15 35.15 ZT4-7 41.6 41.6 41.6 ZT8-11 64.55 64.55 64.55 ZT12-15 63.5 63.5 63.5 ZT16-19 67.8 67.8 67.8 ZT20-23 62.449999999999996 62.449999999999996 62.449999999999996