condition mean min max ZT0-3 32.6 32.6 32.6 ZT4-7 30.4 30.4 30.4 ZT8-11 15.5 15.5 15.5 ZT12-15 79.05 79.05 79.05 ZT16-19 83.0 83.0 83.0 ZT20-23 34.199999999999996 34.199999999999996 34.199999999999996