condition mean min max ZT0-3 197.9 197.9 197.9 ZT4-7 150.0 150.0 150.0 ZT8-11 146.55 146.55 146.55 ZT12-15 232.7 232.7 232.7 ZT16-19 224.5 224.5 224.5 ZT20-23 239.0 239.0 239.0