condition mean min max ZT0-3 1.0835474999999999 0.9984500000000001 1.168645 ZT4-7 0.755285 0.755285 0.755285 ZT8-11 0.7771575 0.7771575 0.7771575 ZT12-15 0 0 0 ZT16-19 1.20149 1.20149 1.20149 ZT20-23 1.33897 1.33897 1.33897