condition mean min max ZT0-3 3.2234375 2.74431 3.702565 ZT4-7 1.708335 1.708335 1.708335 ZT8-11 4.96899 4.96899 4.96899 ZT12-15 0 0 0 ZT16-19 4.987439999999999 4.987439999999999 4.987439999999999 ZT20-23 3.401975 3.401975 3.401975