condition mean min max ZT0-3 193.05 193.05 193.05 ZT4-7 286.9 286.9 286.9 ZT8-11 335.1 335.1 335.1 ZT12-15 330.20000000000005 330.20000000000005 330.20000000000005 ZT16-19 226.85 226.85 226.85 ZT20-23 197.5 197.5 197.5