condition mean min max ZT0-3 42.8727 42.8727 42.8727 ZT4-7 20.01165 20.01165 20.01165 ZT8-11 15.4791 15.4791 15.4791 ZT12-15 17.701900000000002 17.701900000000002 17.701900000000002 ZT16-19 53.13315 53.13315 53.13315 ZT20-23 44.1416 44.1416 44.1416