condition mean min max ZT0-3 27.747974999999997 25.701349999999998 29.7946 ZT4-7 27.109450000000002 27.109450000000002 27.109450000000002 ZT8-11 14.5053 14.5053 14.5053 ZT12-15 0 0 0 ZT16-19 32.33455 32.33455 32.33455 ZT20-23 39.193 39.193 39.193