condition mean min max ZT0-3 63.85 63.85 63.85 ZT4-7 56.4 56.4 56.4 ZT8-11 66.45 66.45 66.45 ZT12-15 53.199999999999996 53.199999999999996 53.199999999999996 ZT16-19 96.25 96.25 96.25 ZT20-23 55.65 55.65 55.65