condition mean min max ZT0-3 11.08071226325 3.9429201189999996 18.2185044075 ZT4-7 49.6462339975 41.497696545 57.79477145 ZT8-11 61.2752113925 58.20859771 64.341825075 ZT12-15 65.5294027125 58.9863318 72.072473625 ZT16-19 53.899476802500004 48.25611270500001 59.5428409 ZT20-23 34.6106305625 29.904120985 39.31714014