condition mean min max ZT0-3 24.8331 22.313000000000002 27.3532 ZT4-7 20.556150000000002 20.556150000000002 20.556150000000002 ZT8-11 22.2668 22.2668 22.2668 ZT12-15 0 0 0 ZT16-19 22.645400000000002 22.645400000000002 22.645400000000002 ZT20-23 25.486449999999998 25.486449999999998 25.486449999999998