condition mean min max ZT0-3 25.951034999999997 7.627255 39.8045 ZT4-7 25.5432 25.5432 25.5432 ZT8-11 31.3504 31.3504 31.3504 ZT12-15 38.620525 34.637150000000005 42.603899999999996 ZT16-19 47.8198 47.8198 47.8198 ZT20-23 48.6721 48.6721 48.6721