condition mean min max ZT0-3 197.45 197.45 197.45 ZT4-7 224.1 224.1 224.1 ZT8-11 241.9 241.9 241.9 ZT12-15 247.6 247.6 247.6 ZT16-19 194.7 194.7 194.7 ZT20-23 215.15 215.15 215.15