condition mean min max ZT0-3 973.1500000000001 973.1500000000001 973.1500000000001 ZT4-7 752.4 752.4 752.4 ZT8-11 774.45 774.45 774.45 ZT12-15 1187.5 1187.5 1187.5 ZT16-19 1286.25 1286.25 1286.25 ZT20-23 1055.25 1055.25 1055.25