condition mean min max ZT0-3 0.33386950000000004 0.332436 0.335303 ZT4-7 0.4152615 0.4152615 0.4152615 ZT8-11 1.764805 1.764805 1.764805 ZT12-15 0 0 0 ZT16-19 0.823108 0.823108 0.823108 ZT20-23 0.248622 0.248622 0.248622