condition mean min max ZT0-3 97.66215 97.66215 97.66215 ZT4-7 84.04105 84.04105 84.04105 ZT8-11 79.908 79.908 79.908 ZT12-15 44.89375 44.89375 44.89375 ZT16-19 80.54044999999999 80.54044999999999 80.54044999999999 ZT20-23 78.25405 78.25405 78.25405