condition mean min max ZT0-3 115.97595 74.96385000000001 141.153 ZT4-7 90.87895 90.87895 90.87895 ZT8-11 88.798 88.798 88.798 ZT12-15 88.318175 81.34475 95.29159999999999 ZT16-19 108.7525 108.7525 108.7525 ZT20-23 150.319 150.319 150.319