condition mean min max ZT0-3 51.749449999999996 51.749449999999996 51.749449999999996 ZT4-7 46.99495 46.99495 46.99495 ZT8-11 42.771249999999995 42.771249999999995 42.771249999999995 ZT12-15 49.1179 49.1179 49.1179 ZT16-19 48.756 48.756 48.756 ZT20-23 52.5419 52.5419 52.5419