condition mean min max ZT0-3 168.42683333333332 147.059 195.7645 ZT4-7 179.607 179.607 179.607 ZT8-11 172.15449999999998 172.15449999999998 172.15449999999998 ZT12-15 164.266 157.0935 171.43849999999998 ZT16-19 161.817 161.817 161.817 ZT20-23 137.627 137.627 137.627