condition mean min max ZT0-3 354.79999999999995 354.79999999999995 354.79999999999995 ZT4-7 233.0 233.0 233.0 ZT8-11 211.45 211.45 211.45 ZT12-15 150.45 150.45 150.45 ZT16-19 106.7 106.7 106.7 ZT20-23 126.25 126.25 126.25