condition mean min max ZT0-3 0.33347750000000004 0.33347750000000004 0.33347750000000004 ZT4-7 0.513574 0.513574 0.513574 ZT8-11 0.104632 0.104632 0.104632 ZT12-15 0.2764365 0.2764365 0.2764365 ZT16-19 0.8409315 0.8409315 0.8409315 ZT20-23 0.27887850000000003 0.27887850000000003 0.27887850000000003