condition mean min max ZT0-3 50.941050000000004 49.07815 52.80395 ZT4-7 53.033550000000005 53.033550000000005 53.033550000000005 ZT8-11 56.96555 56.96555 56.96555 ZT12-15 0 0 0 ZT16-19 53.28435 53.28435 53.28435 ZT20-23 52.603849999999994 52.603849999999994 52.603849999999994