condition mean min max ZT0-3 46.434157 46.434157 46.434157 ZT4-7 75.912855 75.912855 75.912855 ZT8-11 101.5198135 101.5198135 101.5198135 ZT12-15 128.14538399999998 128.14538399999998 128.14538399999998 ZT16-19 79.0007655 79.0007655 79.0007655 ZT20-23 87.19092900000001 87.19092900000001 87.19092900000001