condition mean min max ZT0-3 0.44207599999999997 0.44207599999999997 0.44207599999999997 ZT4-7 0.286634 0.286634 0.286634 ZT8-11 0.254571 0.254571 0.254571 ZT12-15 0.530065 0.530065 0.530065 ZT16-19 0.6695765 0.6695765 0.6695765 ZT20-23 0.5212995 0.5212995 0.5212995