condition mean min max ZT0-3 241.65 241.65 241.65 ZT4-7 247.9 247.9 247.9 ZT8-11 229.5 229.5 229.5 ZT12-15 204.9 204.9 204.9 ZT16-19 249.5 249.5 249.5 ZT20-23 266.4 266.4 266.4