condition mean min max ZT0-3 9.318377131750001 9.152296167500001 9.484458096000001 ZT4-7 9.17676010525 8.6758192895 9.677700921 ZT8-11 14.13931224275 10.1546630305 18.123961455 ZT12-15 28.932677939999998 26.656009065 31.209346814999996 ZT16-19 23.32380453 21.547252115 25.100356945 ZT20-23 22.35072008 20.658366455 24.043073704999998