condition mean min max ZT0-3 138.50216666666665 126.0905 160.6865 ZT4-7 124.4255 124.4255 124.4255 ZT8-11 142.9235 142.9235 142.9235 ZT12-15 178.28125 172.0085 184.55399999999997 ZT16-19 175.42200000000003 175.42200000000003 175.42200000000003 ZT20-23 155.797 155.797 155.797