condition mean min max ZT0-3 23.101950000000002 22.244500000000002 23.9594 ZT4-7 13.382200000000001 13.382200000000001 13.382200000000001 ZT8-11 16.977449999999997 16.977449999999997 16.977449999999997 ZT12-15 0 0 0 ZT16-19 21.6377 21.6377 21.6377 ZT20-23 25.65625 25.65625 25.65625