condition mean min max ZT0-3 0.0265246 0.0265246 0.0265246 ZT4-7 0.0184581 0.0184581 0.0184581 ZT8-11 0.0299095 0.0299095 0.0299095 ZT12-15 0.01826445 0.01826445 0.01826445 ZT16-19 0.0321588 0.0321588 0.0321588 ZT20-23 0.01600005 0.01600005 0.01600005