condition mean min max ZT0-3 40.059400000000004 39.2167 40.902100000000004 ZT4-7 28.1845 28.1845 28.1845 ZT8-11 54.9582 54.9582 54.9582 ZT12-15 0 0 0 ZT16-19 74.4893 74.4893 74.4893 ZT20-23 58.25435 58.25435 58.25435