condition mean min max ZT0-3 22.25 22.25 22.25 ZT4-7 30.0 30.0 30.0 ZT8-11 12.350000000000001 12.350000000000001 12.350000000000001 ZT12-15 24.25 24.25 24.25 ZT16-19 23.25 23.25 23.25 ZT20-23 20.299999999999997 20.299999999999997 20.299999999999997