condition mean min max ZT0-3 16.95382144225 9.7923053345 24.11533755 ZT4-7 18.9183005475 15.730771484999998 22.10582961 ZT8-11 26.1349831 23.603899245 28.666066955 ZT12-15 31.369426365000002 27.03436924 35.70448349 ZT16-19 39.4393577375 36.910108320000006 41.968607155 ZT20-23 41.3091379975 38.02315094 44.595125055