condition mean min max ZT0-3 5.809712500000001 5.458545000000001 6.160880000000001 ZT4-7 1.70322 1.70322 1.70322 ZT8-11 0.0907935 0.0907935 0.0907935 ZT12-15 0 0 0 ZT16-19 1.932725 1.932725 1.932725 ZT20-23 2.46779 2.46779 2.46779