condition mean min max ZT0-3 228.35 228.35 228.35 ZT4-7 272.5 272.5 272.5 ZT8-11 298.35 298.35 298.35 ZT12-15 241.39999999999998 241.39999999999998 241.39999999999998 ZT16-19 182.3 182.3 182.3 ZT20-23 177.6 177.6 177.6