condition mean min max ZT0-3 86.2 86.2 86.2 ZT4-7 70.0 70.0 70.0 ZT8-11 45.199999999999996 45.199999999999996 45.199999999999996 ZT12-15 49.0 49.0 49.0 ZT16-19 10.6 10.6 10.6 ZT20-23 48.4 48.4 48.4