condition mean min max ZT0-3 189.155134 189.155134 189.155134 ZT4-7 151.47900449999997 151.47900449999997 151.47900449999997 ZT8-11 148.1217015 148.1217015 148.1217015 ZT12-15 147.661234 147.661234 147.661234 ZT16-19 107.1543495 107.1543495 107.1543495 ZT20-23 87.02389 87.02389 87.02389