condition mean min max ZT0-3 146.995301 146.995301 146.995301 ZT4-7 176.34981900000002 176.34981900000002 176.34981900000002 ZT8-11 113.19403299999999 113.19403299999999 113.19403299999999 ZT12-15 188.604916 188.604916 188.604916 ZT16-19 133.3327735 133.3327735 133.3327735 ZT20-23 143.35427750000002 143.35427750000002 143.35427750000002